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Comprehensive grammar rules tested on the SAT including verb tense, parallelism, modifier placement, comparisons, and idiomatic expressions.
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Identify and fix the error: "Each of the students must bring their own supplies to class."
Error: Pronoun-antecedent agreement
"Each" is SINGULAR, but "their" is PLURAL.
Fix: "Each of the students must bring his or her own supplies to class."
Or restructure: "All students must bring their own supplies to class." (Now the subject is plural to match "their.")
Answer: Change "their" to "his or her" or change "Each" to "All."
Rule: Singular indefinite pronouns (each, every, either, neither, anyone, everyone, nobody) must be matched with singular pronouns (he, she, it, his, her, its).
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Choose the correct option: "The coach told the players that (they/he) needed to practice harder."
Context matters for pronoun clarity:
The correct answer depends on the intended meaning:
If the coach wants the PLAYERS to practice harder → they ✅ If the coach is saying HE HIMSELF needs to practice harder → he ✅
On the SAT: Context from surrounding sentences will make the intended meaning clear. Read the full paragraph.
SAT Rule: A pronoun must clearly refer to ONE specific antecedent. If it's ambiguous (could refer to multiple nouns), the sentence needs to be rewritten.
Answer: Most likely "they" (the coach is telling the players to improve), but read context.
Fix the error: "Running quickly through the park, the dog was spotted by Maria."
Error: Dangling/misplaced modifier
"Running quickly through the park" is a participial phrase that should modify the subject of the main clause. But "the dog" is the grammatical subject — it sounds like the dog was running.
If MARIA was running: "Running quickly through the park, Maria spotted the dog." ✅ (Now "Maria" is the subject, and she's the one running.)
If THE DOG was running: "Maria spotted the dog running quickly through the park." ✅ (Restructure so the modifier is next to what it describes.)
Answer: Rewrite so the modifier is next to the noun it describes.
SAT Rule: A modifying phrase at the beginning of a sentence MUST describe the subject that immediately follows the comma.
Identify and fix the error: "The scientist, along with her research assistants, are publishing the findings next month."
Error: Subject-verb agreement with an interrupting phrase
"Along with her research assistants" is a parenthetical phrase — it does NOT make the subject plural.
The subject is "The scientist" (singular), so the verb must be singular: "is publishing"
Corrected: "The scientist, along with her research assistants, is publishing the findings next month." ✅
Rule: Phrases set off by commas like:
do NOT change the number of the subject. Only "and" creates a compound subject.
Answer: Change "are" to "is."
Compare: "The scientist and her assistants are publishing..." (Here "and" creates a plural compound subject.)
Fix all errors in this sentence: "After reviewing the data carefully, it was concluded by the committee that the proposal, which were submitted last week, needed revisions before they could be approved."
Error 1: Dangling modifier "After reviewing the data carefully, it was concluded..." → Who reviewed the data? Not "it." Fix: "After reviewing the data carefully, the committee concluded..."
Error 2: Passive voice (not technically an error, but the SAT prefers active) "it was concluded by the committee" → "the committee concluded"
Error 3: Subject-verb agreement "the proposal, which were submitted" → "proposal" is singular → "which was submitted"
Error 4: Pronoun reference "before they could be approved" → "they" is ambiguous (could refer to proposal or revisions). Should be "before it could be approved" (referring to the proposal).
Corrected sentence: "After reviewing the data carefully, the committee concluded that the proposal, which was submitted last week, needed revisions before it could be approved." ✅
Answer: Four corrections: dangling modifier, passive voice, SVA ("was"), pronoun reference ("it").