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Grammar · ACT

ACT English: Grammar and Usage

Grammar and usage rules most frequently tested on the ACT English section, beyond rhetorical skills. Front: the rule or example sentence. Back: the rule explanation or corrected version.

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Which verb form is correct: 'The team are playing well' or 'The team is playing well'?
The team is playing well. Collective nouns take a singular verb in American English.
Correct the error: 'Each of the students were asked to submit their homework.'
Each of the students was asked to submit his or her homework. Each is always singular.
When should 'who' be used instead of 'whom'?
Use 'who' when it is the subject of a clause or sentence. It is a nominative case pronoun.
Choose the correct form: 'She is taller than me' or 'She is taller than I'?
She is taller than I am. Use the nominative case (I) because it is part of a clause.
Correct: 'The manager gave the task to John and I.'
The manager gave the task to John and me. Use objective case (me) as the object of a preposition.
What is wrong with this sentence: 'The book lost its pages, and it was damaged.'?
The sentence is correct. 'Its' is the possessive pronoun and is spelled correctly here.
Correct the error: 'It's cover was blue.'
Its cover was blue. Use the possessive pronoun 'its' (not the contraction 'it's', which means 'it is').
Identify the error: 'There going to the store, and they took there bags.'
They're going to the store, and they took their bags. 'There' is a place, 'they're' means 'they are', 'their' is possessive.
Which sentence uses correct parallel structure: (A) 'She likes running, swimming, and to hike.' (B) 'She likes running, swimming, and hiking.'
(B) is correct. Use the same grammatical form for all items in a series (gerunds here: running, swimming, hiking).
Correct: 'The committee decided to raise taxes and cutting spending.'
The committee decided to raise taxes and cut spending. Use parallel structure with infinitives or base verbs.
Identify the run-on sentence: (A) 'The storm passed quickly, and the sky cleared.' (B) 'The storm passed quickly the sky cleared.'
(B) is a run-on sentence. It needs a conjunction or punctuation: 'The storm passed quickly; the sky cleared.'
What is a sentence fragment?
A sentence fragment is an incomplete sentence that lacks either a subject or a predicate, or expresses an incomplete thought.
Correct the dangling modifier: 'Walking to school, the rain began to fall.'
Walking to school, I felt the rain begin to fall. The modifier must logically describe the subject that follows.
Identify the misplaced modifier: 'I saw a bird in the tree watching the sunset.'
Misplaced: it is unclear whether I or the bird was watching the sunset. Corrected: 'Watching the sunset, I saw a bird in the tree.'
When should a comma be placed before a coordinating conjunction?
Use a comma before a coordinating conjunction (and, but, or, nor, for, yet, so) only when it joins two independent clauses.

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