ACT English Comma Usage and Apostrophes Quiz

This sentence correctly uses commas to separate items in a list. The phrase "milk, eggs, and bread" is clearly delineated, following the standard convention of placing a comma before the conjunction "and" in a series. The other options either misuse commas or lack clarity in listing the items.

This sentence correctly uses the apostrophe to indicate possession for multiple dogs. "Dogs'" shows that the tails belong to more than one dog, while "tails" is properly pluralized. The other options either misuse the apostrophe or fail to indicate possession correctly.

A comma is needed before a coordinating conjunction (like "but") when it connects two independent clauses. In the sentence "I wanted to go hiking, but the weather was bad," both parts can stand alone as complete sentences, making the comma necessary for clarity and proper punctuation.

The phrase "The girls' book" indicates that the book belongs to multiple girls, making it the correct possessive form. The apostrophe after "girls" signifies possession, while "book" remains singular, correctly indicating that one book is shared among them. The other options either misuse apostrophes or incorrectly match singular and plural forms.

This sentence correctly uses commas to separate items in a series, ensuring clarity and proper punctuation. The inclusion of the Oxford comma before "and grapes" is also stylistically acceptable, helping to avoid ambiguity in lists. The other options lack necessary commas, making them grammatically incorrect.

The contraction "won't" is the correct form of "will not." It combines the auxiliary verb "will" with "not," using an apostrophe to replace the missing letters. The other options either lack proper apostrophe placement or are incorrect forms, making "She won't be able to attend" the grammatically accurate choice.

An introductory phrase sets the stage for the main clause that follows. In this case, "After the movie" is an introductory phrase that requires a comma to separate it from the main action of the sentence, ensuring clarity and proper punctuation. This enhances readability and indicates a pause before the main point.

The possessive form of a singular noun is created by adding an apostrophe followed by an "s." In this case, "James's" correctly indicates that the car belongs to James, while the other options either misuse the apostrophe or are grammatically incorrect.

The sentence correctly uses commas to set off the nonrestrictive clause "who is a doctor." This clause provides additional information about "Maria" but is not essential to the meaning of the sentence. The commas indicate that the main idea remains clear even without this extra detail.

The phrase "the children's toys" correctly uses an apostrophe to indicate possession for the plural noun "children." The apostrophe is placed before the "s" to show that the toys belong to multiple children. This distinguishes it from the incorrect options, which misuse apostrophes or fail to indicate possession properly.

Commas are used to set off non-restrictive relative clauses that add extra information but do not change the main meaning of the sentence. In "The book, which I read last week, was amazing," the clause "which I read last week" provides additional context about the book without limiting the identity of the subject.

The contraction "they're" combines "they" and "are," indicating that a group is performing an action. The other options either misuse "their," which denotes possession, or contain spelling errors, making "they're" the only correct choice in this context.