Key to Comments and Commonly Confused Words
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|Ap.||CS (comma splice)||Fused||N/pron agr.||Thesis|
|As/like||Cosmic opening||Hyphen||Parallel||Title or Italics|
|CW (confused words)|
|Block Quotation||DM (dangling modifier)||I/you||Pron.||Topic|
|Choppy||Diction||I think||Res.||WW (wrong word)|
|Colon||Drop (dropped quotation)||Mixed||Quot.||Wordy|
|Comma series||Frag||NCSV||S/v agr|
|Affect/Effect||Disinterested / Uninterested||Precede / proceed|
|Accede/Exceed||Everyday / Every day||Simple / simplistic|
|Accept/Except||Hang/hung||They're / their / there|
|All of a sudden/All of the sudden|
|Begs the question||Infer / Imply||Then / than|
|Not that big a deal/Not that big of a deal|
|Compliment/Complement||Its / It's|
|Conscious/conscience/consciousness||Lead / led||Too / two / to|
|Compose/Comprise||Lie / lay||Verbal / oral|
|Council/Counsel||Loath / loathe||Who / whom|
|Different from/Different than||Loose / lose||Your / you're|
|Discrete/Discreet||Pour / pore||Woman/women|
Ap. Apostrophe use. Use apostrophes to indicate possessive forms. For example, the coat belonging to Bob would be "Bob's coat," not "Bobs coat." A toy belonging to two sisters would be "the sisters' toy" and not "the sister's toy"; the latter form would apply if you were discussing only one sister.
1. Apostrophes are used only rarely to form plurals.
- Incorrect: The company's held a joint picnic.
- Correct: The companies held a joint picnic.
2. Although decades used to be written using the apostrophe ( the 1920's), currently the correct practice is to omit the apostrophe: the 1920s.
- Incorrect: 1920’s
- Correct: 1920s
3. The same rule applies to most plurals of abbreviations that used to have apostrophes: CDs, DVDs, TVs, URLs.
4. According to the Chicago Manual of Style (15th ed.), "To avoid confusion, lowercase letters and abbreviations with two or more interior periods or with both capital and lowercase letters form the plural with an apostrophe and an s" (7.16). Example: M.A.'s and Ph.D.'s or MAs and PhD's (both are correct); x's and y's, p's and q's.
All of a sudden/All of the sudden. "All of a sudden" is correct.
As/like. "Like" is a preposition; it can be used only with nouns. "As" is a conjunction; it is used with clauses (group of words containing a subject and a verb).
Block Quotation. Quotations comprising more than four lines of text are usually set off as block quotations. Here are a few hints for using block quotations:
1. Indent 10 spaces. Indent the text 10 spaces from the left margin (in Word, hit the Increase Indent button twice).
2. Double space. Do not single-space the quotation unless the rest of the document is also in a single-spaced format.
3. Use a colon. Block quotations are usually introduced with a full sentence with a colon before the quotation.
4. No quotation marks. Do not use quotation marks around the quotation. The fact that it is set apart from the text shows that it is a quotation.
5. MLA. In MLA format, put the citation information (Smith 123) after the period at the end of the quotation.
6. Inside paragraphs . Block quotations are usually used within paragraphs; it is not necessary to start a new paragraph after using a block quotation.
7. Be sparing with quotations . Most important: use only as much of the quotation as you need. The reader will expect to see an analysis of the passage that is about the same length as the passage itself.
Choppy. The notation "choppy" indicates a group of sentences that may be grammatically correct but that seem to have no relationship to each other. Each sentence does not relate closely to the previous sentence, and the effect is that of a paragraph that seems to stop and start with each sentence.Choppy sentences can be combined to vary the sentence pattern. Also, transitions can help to make choppy sentences flow more smoothly in the paragraph.
Colon. Colons are used to introduce lists, quotations, and final appositives. They typically are used like this: general statement or idea: more specific statement, idea, or example.
1. In the following sentence, the phrase "three things" is the general part of the equation; the phrase "bats, snakes, and toads" constitutes the specific part.
- Correct: “ She liked three things: bats, snakes, and toads.”
2. In this example, "these words" is the general part of the equation, which is followed (after the colon) by the specific quotation that relates to it.
- Correct: “ John F. Kennedy inspired a generation with these words: ‘Ask not what your country can do for you; ask what you can do for your country.’"
3. A good test for a colon is to see whether you can substitute a period for a colon; if not--that is, if the colon does not occur after a full sentence--then the colon should not be used either.
- Incorrect: “ Three things he liked are: bats, snakes, and toads.”
- Correct: “Three things he liked are bats, snakes, and toads.”
4. Colons are used after "as follows" but never after "such as."
Comma compound. Comma between two parts of a compound sentence. A compound sentence contains two independent clauses joined by a coordinating conjunction (and, but, or, for, so, yet), and it requires a comma before the coordinating conjunction.
Note that two items in other kinds of compounds do not require commas.
- Incorrect: “ She walked into the water, and waded across the creek.” Note the unnecessary comma.
- Correct: “ She walked into the water and waded across the creek.”
- Correct: “ She walked into the water, and she waded across the creek.”
- Incorrect: “ Students wanted to do their research, and to increase their understanding.”
- Correct: “ Students wanted to do their research and to increase their understanding.”
Comma intro. Commas after introductory clauses and phrases. Use commas after introductory clauses and phrases to prevent confusion.
Comma series. Commas after items in a series (or Oxford comma). A comma should be used after each of the items in a series of three or more.
Don't use a comma if there are only two items.
CS. Comma Splice.
A comma splice occurs when two sentences are joined only with a comma.
- Incorrect: “ We went to the movies, however, they stayed home.”
Comma splices can be corrected in four ways:
1. By breaking the sentences into two using a period. Correct: "We went to the movies. They stayed home.”
2. By using a coordinating conjunction ( and, or, but, for, so, yet). Correct: “We went to the movies, but they stayed home.”
3. By using a subordinating conjunction such as "because." Correct: “We went to the movies, although they stayed home.”
4. By using a semicolon to separate the parts. Correct: "We went to the movies; however, they stayed home.”
Cosmic opening. The term "cosmic opening" refers to an introductory sentence that is too general for the content of the paper and tells the reader what he or she already knows:"Throughout history, many authors have written literature" or "Since the dawn of time, scapegoats have existed in human society" or "People have always been inspired by the beauties of nature." Although the opening sentence of a paper may be somewhat more general than what follows, it should not be as general and obvious as these statements.
DM (Dangling modifier) . Dangling modifiers occur when subjects are left out of sentences.
- Incorrect: Driving through the woods, a bear stopped our car.
The "we" that should be the subject has been left out. What remains suggests that the bear is driving the car.
- Correct: When we were driving through the woods, a bear stopped our car.
Diction. Informal level of diction. Blog posts, Facebook updates, texting, Twitter, personal literature journals, and other informal venues are places to try out your ideas and opinions using informal language. However, formal papers use assertions and evidence to prove their points. Simply stating something like "I think Emily Dickinson was crazy" does not constitute evidence; it is an opinion (see Fact, Opinion, Belief, Theory above).
Dropped Quotation. A dropped quotation is a quotation inserted into the text without a signal phrase. Note how the quotation in this example is "dropped" into the paragraph so that the reader is unsure who is speaking.
You can find more examples and solutions at these links: http://www.bergen.edu/faculty/ljonaitis/style_dropped_quotations.htm ; http://instructors.dwrl.utexas.edu/mitchell/node/29
Ellipsis. An ellipsis, which is indicated by three spaced dots (. . . ), shows that something has been omitted from the middle of a quotation. The plural of “ellipsis” is “ellipses.”
1. With few exceptions, you should not use ellipses at the beginning and end of a quotation.
- Incorrect: For the townspeople, Miss Emily Grierson was “ . . . a hereditary obligation on the town . . .” (Faulkner 237).
- Correct: For the townspeople, Miss Emily Grierson was “a hereditary obligation on the town” (Faulkner 237).
According to the Chicago Manual of Style , ellipses are typically not used at the beginning or end of a quotation (see 11.57 ff) unless the quotation begins "with a capitalized word (such as a proper name) that did not appear at the beginning of a sentence in the original" (11.65).
2. If the material you’re omitting includes the end of a sentence, you can include the period along with the ellipsis (four periods instead of three).
Fact, Opinion, Belief, Theory. People are often confused about the differences among these concepts, and the words are often misused.
1. A fact is an idea generally acknowledged to be true by rational people. It is based on evidence and logic. There is no such thing as an "alternative fact," which is either a misunderstanding or a lie.
2. A belief is an idea widely held by a group of people; its truth is evident to them but not to others outside the group. A particular group may call its belief a "fact," but that does not make it so. A belief may be treated as a fact by those within the group, but those outside the group may not agree.
3. An opinion is an idea held by an individual. People often use the term "theory" to describe their opinions, but individual theories are not subject to the same rigorous testing as scientific theory; "theory" in this individual sense has a very different meaning from "scientific theory."
4. An assertion, which is often used in writing, is an arguable idea similar to an opinion, but it must be supported by evidence.
5. A generalization is a statement of a conclusion that seems to be based on certain evidence, but generalizations, like assertions, must be supported with evidence.
6. A scientific theory is an idea generally acknowledged by rational people to be the best explanation of a natural phenomenon. It is based on physical evidence, the accumulated results of scientific research, and the known laws of science (e.g., the law of conservation of matter). A scientific theory is testable and based on evidence; it is not merely an opinion.
Fragment. A fragment is an incomplete sentence:
The second part of the quotation is a fragment.
Fragments need to be corrected by adding a subject or verb where needed, or by joining the fragment to the preceding sentence.
- Correct: We went to the beach, a nice place to be on a hot day.
Fused/Run-on . A fused sentence occurs when two separate sentences are punctuated as a single sentence:
Fused sentences are like comma splices except that they do not have a comma where the two sentences are joined. They can be corrected in the same four ways:
1. With a coordinating conjunction. Correct: We went to the movies, and they stayed home.
2. With a semicolon. Correct: We went to the movies; they stayed home.
3. With a period. Correct: We went to the movies. They stayed home.
4. With a subordinating conjunction. Correct. When we went to the movies, they stayed home
Hyphen. Hyphens should be used in the following ways:
1. In certain nouns with prefixes: self-esteem, all-American, ex-husband, and so forth.
2. In compound adjectives used before nouns. Example: rain-soaked roof; rose-colored glasses.
3. In numbers: twenty-five, forty-seven.
I/you. Indefinite pronoun. Indefinite use of "you" and "it ." Avoid sentences that use an indefinite "you."
Intensifiers (so, very). The overuse of intensifiers such as "so" or "very" (and, in punctuation, the exclamation point), may be a signal that the paper is relying on emphatic statements ("It was very cold!") rather than providing evidence of the assertion. If you find a pattern of these in your paper, reread the paper and ask yourself whether the case you're making could be supported more effectively.
I think/I feel/I believe. These can almost always be omitted in formal writing. It's your paper; of course you think/believe/feel the statement that follows these words.
Mixed sentences. A mixed sentence occurs when the subject and predicate of a sentence don't match.
1. In the following sentence, the change doesn't grow slowly; the population does.
- Incorrect: "The change in population grew slowly."
- Correct: “The population grew slowly.
2. Sentences that use “is when,” “is where,” “is because,” and such constructions are mixed sentences.
- Incorrect: “ An example of irony is when the Swede laughs.”
- Correct: “A good example of irony is the Swede's laughter.”
- Incorrect: “ The reason he was late is because he overslept .”
- Correct: “ The reason he was late is that he overslept.”
- Correct: “ He was late because he overslept.”
MLA. MLA format requires the author's last name and page number for parenthetical references.
1. For first citations, the title is also incorporated into the signal phrase, or phrase introducing the quotation.
- Correct: In William Faulkner's "A Rose for Emily," the townspeople view Miss Emily as "a tradition, a duty, and a care, a sort of hereditary obligation on the town" (267).
2. If the author's name does not occur in the signal phrase, it should appear in the parenthetical reference:
- Correct: The townspeople viewed Miss Emily as "a tradition, a duty, and a care" (Faulkner 267).
3. Note that there is no comma between the author's name and the page number.
4. Except in the case of block quotations, the period follows the closing parenthesis rather than being placed inside the quotation marks.
NC. No comma is needed between two parts of a compound construction. For example, no comma is needed between the two verbs in this sentence:
NCSV. No comma is necessary between subject and verb.
Not that big a deal/Not that big of a deal. The former is always correct.
N/pron agr. Noun-pronoun agreement . Although "they" and "their" are often used informally in speech to refer to singular nouns, using "they" or "their" to refer to a singular noun is incorrect, since these are plural forms.
This rule is now being relaxed in style guides since "they" is the preferred pronoun for trans individuals, so this agreement issue will be noted but not marked as an error. The following describes the general rules.
1. Pronouns should agree in number with the noun to which they refer.
- Incorrect: "A student knows that they should study to get good grades."
- Correct: "A student knows that he or she should study to get good grades.”
- Correct: "Students know that they should study hard to get good grades."
2. Generally, use a singular pronoun when the antecedent is an indefinite pronoun ( someone, each, everyone, anyone ).
- Incorrect: Each student got their books.
- Correct: Each student got his or her books.
- Correct: All the students got their books.
Parallel. Faulty parallelism. Grammatical elements in a series need to be consistent in form.
Pron. Pronoun Reference. Vague pronoun reference occurs when the antecedent of the pronoun isn't clear.
Res/Nonres. Restrictive and nonrestrictive elements. (Note: For some good examples, go to Ben Yagoda's explanation in the New York Times.)
Nonrestrictive clauses and phrases are "extra information"; if they are removed, the meaning of the sentence remains the same.
1. Transitional expressions such as “ however,” “ in fact,” and similar phrases should be set off with commas if they are within a single sentence.
- Correct: You will not, however, regret studying at Hogwarts.
2. Nonrestrictive elements should be set off with commas.
- Correct: The Magna Carta, which was signed in 1215, is a distant ancestor of our Bill of Rights.
The phrase "which was signed in 1215" could be omitted without changing the basic meaning of the sentence.
- Incorrect: The Magna Carta which was signed in 1215 is a distant ancestor of our Bill of Rights.
The lack of commas around “which was signed in 1215” implies that it is restrictive, or essential information. In the context of the sentence, that would imply that the Magna Carta was one of a series of Magna Cartas rather than the only one.
3. Restrictive clauses and phrases are those that would change the meaning of the sentence if removed. Restrictive elements are not set off with commas.
4. The pronoun "that" always signals a restrictive element.
5. One common misuse of nonrestrictive commas involves the titles of literary works. For example, the commas around the title in the example below suggest that it is extra information and that James Joyce only wrote one story (which isn’t true).
- Incorrect: In his story, "Araby," James Joyce writes of a young boy's initiation.
- Correct: In his story "Araby," James Joyce tells the story of a young boy's initiation.
Memory tip: Try putting your thumb over the information within the commas. If the sentence changes without that information, the information restricts the meaning of the sentence, and you don't need the commas.
Quot. Quotation Marks. Quotation marks are used to show that another person's words are being quoted, and their placement varies according to the sentence. In American usage, double quotation marks are used as the default mark.
1. With periods and commas. With the exception of MLA citation format, quotation marks are placed OUTSIDE periods and commas.
- Correct: James said, "We must grant the artist his donnée."
2. With semicolons and colons. Quotation marks go INSIDE semicolons and colons.
- Correct: Howells promoted the "smiling aspects of life"; he also encouraged writers to look at the "real grasshopper."
3. With exclamation points and question marks. Quotation marks may go INSIDE or OUTSIDE exclamation points and question marks.
- Correct: Did Sherman once say, "War is all hell"?
- Correct: Hitler once asked, "Is Paris burning?"
4. Quotations within an already existing quotation (with double “ “) are marked with single quotation marks.
1. Semicolons separate sentence parts of equal grammatical rank, such as independent clauses or phrases in a series in which the individual items contain commas.
- Correct: We wanted to leave; however, they wanted to stay.
- Correct: He had collected the following: thirty-two fountain pens, each with its own case; forty bottles of ink; a shaker of sand, which he did not need to use since the ink was of the quick-drying kind; and a green paper desk blotter.
2. Semicolons should not be used to separate main clauses from dependent clauses or phrases. The part after the semicolon in the following example would be considered a fragment.
- Incorrect: We went to the beach; a nice place to be on a hot day.
- Correct: We went to the beach, a nice place to be on a hot day.
Shift. The notation "shift" indicates a shift between first person (I), second person (you), or third person (he, she, they, it)
S/V AGR (subject-verb agreement) indicates a singular verb with a plural subject or vice versa. Be sure to use the appropriate verb with singular and plural subjects.
Thesis. A thesis statement defines the scope and purpose of the paper. It needs to meet three criteria:
1. It must be arguable rather than a statement of fact. It should also say something original about the topic.
2. It must be limited enough so that the paper develops in some depth.
3. It must be unified so that the paper does not stray from the topic.
4. Statements such as "In this essay I will discuss " or "I will compare two stories" are not thesis statements and are unnecessary, since mentioning the stories in the introduction already tells the reader this.
Read more about thesis statements and topic sentences here: http://www.wsu.edu/~campbelld/topic.htm.
Title/Italics. Titles should be marked with italics (underlining) or quotation marks, depending on the work being discussed.
1. Titles of works that appear within a volume, such as short stories, poems, and essays, should be placed in quotation marks: " Araby," "The Prophecy," "Dulce et Decorum Est."
2. Titles of works that are a volume in themselves, such as books, magazines, newspapers, plays, and movies, should be set off with underlining or italics: Hamlet, Little Women .
3. Your own title should neither be underlined nor placed in quotation marks unless it contains the title of the work you're discussing. In that case, only the title of the work should be punctuated as a title.
Topic. Good topic sentences can improve an essay's readability and organization. They usually meet the following criteria:
Read more about thesis statements and topic sentences here: http://www.wsu.edu/~campbelld/topic.htm.
WW. Wrong word. The "WW" symbol indicates a word that may be correctly spelled but is incorrectly used. It may mean that a preposition is being used in nonstandard ways ("we rode on the car" instead of "we rode in the car") or it may mean that the word used does not fit the meaning or context of the sentence.
Wordy. Wordy sentences are those that use more words than they need in order to get their point across. Some wordy sentences use nouns made from verbs (nominalizations): “ He made a declaration” instead of “ He declared.” Others use excess clauses or phrases: “ The book that was blue” instead of “ The blue book.” Still other wordy sentences may use certain phrases: “ Due to the fact” that instead of “ Since” or “ Because.”
1. Affect is a verb; it means "to have an impact or influence upon."
- Incorrect: The moon effects the timing of the tides.
- Correct: The moon affects the timing of the tides.
2. Effect is generally a noun.
- Incorrect: I have that affect on people.
- Correct: I have that effect on people.
3. Two exceptions are as follows:
3a. Psychologists sometimes use "affect" (pronounced AFFect, unlike the verb form affECT) to mean a person's emotional presentation. Example:"Her affect was flat."
3b. "Effect" is used as a verb in specific idioms, such as "to effect a change"--that is, to cause a change to occur. Example: "He effected the change in the rules so that he would be the chairperson permanently."
Accede/Exceed. Accede means "to agree to, to yield to. Exceed means "to go beyond" in the sense of passing beyond limits
Accept/Except. Accept means "to receive willingly." Example: "He accepted her invitation." Except means "to exclude." Example: "She invited everyone except her cat."
Begs the question. Begs the question” does not mean “asks the question." To say that something begs the question means that it avoids the question, not that it raises the question. It's a type of logical fallacy (petition principii) that states something as obvious or true when it isn't.
If you can reword the sentence in which you're using "begs the question" as "asks the question," you're using "begs the question" incorrectly.
Compliment/complement. To compliment (with an “i”) means "to praise." To complement (with an "e") means to complete or enhance.
Compose/Comprise . Comprise means "is made up of"; the whole comprises its parts. Compose means "to make up": five players compose a basketball team. "Comprised of" should actually be "composed of" in the most common error involving these words.
Conscious/conscience/consciousness. Conscious is an adjective; it means "aware."
Conscience is a noun; it means "the sense or consciousness of the moral goodness or blameworthiness of one's own conduct, intentions, or character together with a feeling of obligation to do right or be good."
Consciousness means "the state of being conscious" or "the totality of conscious states of an individual."
Council/counsel. A council (noun) is a group of advisers. To counsel someone (verb) is to give that person advice. Sometimes a counsellor will be said to give "wise counsel" (advice).
Different from/ Different than. Different from is preferable to Different than.
Discrete/Discreet. Discrete means "separate." Discreet means "unobtrusive.
Disinterested/Uninterested. Too often, people use "disinterested" to mean "uninterested." Disinterested means "impartial'; uninterested means "having no interest." Example: A judge is--or should be--"disinterested"; a cat is "uninterested" in the outcome of a baseball game.
Everyday, Every day . Everyday (spelled as one word) is an adjective: "The dishes were intended for everyday use." Every day (spelled as two words) functions as an adverb: "I washed my hair every day."
Hang, Hung "Hung" is the past tense and past participle form of "hang" and should be used with this one exception: those who are executed by hanging are said to "be hanged."
Infer and Imply. To infer something is to deduce a conclusion from someone else's actions. You can infer something from what you see or hear.
To imply something is to drop some kind of implicit hint for someone else to pick up.
It's and Its. It's is a contraction meaning "it is."
Its is a possessive form meaning "belonging to it."
Lead, led. Lead as a noun is the metal; lead is also the present tense of the verb "to lead."
Led is the past tense of the verb lead.
Lie/lay. Lie is an intransitive verb (a verb that takes no direct object); it means "to recline." Lay is a transitive verb (a verb that must have a direct object); it means "to put" or "to place."Confusion arises because lay is also the past tense form of lie. There's also the intransitive verb "to lie," which means "to tell an untruth." See the table below for some help.
Examples of the verb "to lie" ("to recline")
Example: Today the cat lies on the couch.
Yesterday the cat lay on the couch
Many times the cat has lain on the couch.
As I came into the room, the cat was lying on the couch.
Examples of the verb "to lay" ("to put or place") (Note: This verb always takes a direct object, in this case "book.")
Today I walk into the room and lay the book on the table.
Yesterday I came into the room and laid the book on the table.
Many times I have come into the room and laid the book on the table.
As I came into the room and was laying the book on the table, a door slammed.
Examples of the verb "to lie" ("to tell an untruth")
Today he lies about the missing key.
Yesterday he lied about the missing key.
Many times he has lied about the missing key.
Accusing of lying about the missing key, he lied again.
Loath/Loathe. Loath (without the e) is an adjective; it means "reluctant." Example: “She was loath to unleash the fury of the whole group on its one erring member.”
Loathe (with the e) is a verb; it means "to detest." Example: “ He loathed having pink ribbons with cat faces braided into his hair.”
1. Lose is the verb form.
- Incorrect: We did not want to loose our way.
- Correct: We did not want to lose our way.
2. Loose is generally an adjective meaning free or unconfined.
- Correct: We appreciated the freedom of loose clothing.
3. Occasionally loose is used as a verb meaning "to set free or unleash": “ Zeus loosed his powers of destruction on an uncaring world.”
Pour/pore. To pour something is to distribute a liquid or other material (such as grain) into another container or over another substance. A pore is usually a noun (as in the pores of one's skin), but when pore is used as a verb, it means to scrutinize something carefully.
1. Precede means "to go before." Example: “ His reputation as a vampire preceded him.”
2. Proceed means "to go ahead" or "to begin and continue an action." Example: “ Disappointed at our loss in the debate, we proceeded to eat six pints of Ben and Jerry's ice cream.”
Simple, simplistic . Simplistic is not a more impressive way of saying simple. Simplistic is a pejorative (negative) term meaning "overly simple," and it conveys a criticism of the idea being expressed. Saying that an idea is simplistic means that it is simple to the point of being stupid.
Their, there, they're.
1. Their is possessive; it means "belonging to them." Example: “ The hit men got into their car and drove away.”
2. There refers to a place: “ When I got there, no one was around.”
3. They're is a contraction meaning "they are." Example: “ They're unlikely to shoot innocent bystanders.”
Then, than. See also "different from, different than"
1. Then is a measurement of time: "We went to the movies, and then we came home."
2. Than indicates comparison: "He ran more quickly than I did."
To/too/two . To is either the first part of an infinitive phrase ("to laugh") or a preposition ("to the mountain"). Too is an intensifier used before adverbs and adjectives: "We were laughing too hard to speak" and "The dog was too submissive to be a guard dog." Two is the numeral 2.
Verbal, Oral. Many people use the term "verbal communication" to mean "communication transmitted by speech."
1. "Verbal" communication is communication in words; the words can be written as well as spoken.
2. "Oral" communication refers to speech.
Who, whom. Who is the subject case; you use who when you need a subject for a verb. Whom is the object case; you use whom when you're using a preposition or another construction in which an object is needed.One easy rule to follow is this, if you're writing a question: Answer the question and see which of those cases you would use.
Woman, Women. "Women" is the plural form of "woman." "A women" is always incorrect; "a woman" is correct.
Your, You're. "Your" is the possessive form of "you": "Give me your money or your life." "You're" is a contraction for "you are": "You're the millionth customer and deserve a prize."