SAT Grammar Practice Questions: The 7 Rules You'll See on Every Test

The grammar and conventions section of the digital SAT is one of the most predictable parts of the test. Unlike reading comprehension, grammar questions test a specific set of rules. Learn those rules, and this section becomes almost mechanical.

How Grammar Questions Work on the Digital SAT

You're given a short passage with an underlined portion or blank. You choose the answer that conforms to Standard English. There is always one answer correct by rule, not opinion. "Sounds good" is not a valid reason.

Rule 1: Punctuation Between Clauses

• Semicolon: joins two independent clauses

• Colon: follows a complete clause to introduce a list or elaboration

• Comma splice: two independent clauses joined by only a comma — always wrong

Example: "The study ran for three years; the results were published in 2024." Both sides are complete sentences — semicolon is correct.

Rule 2: Subject-Verb Agreement

Cross out any phrase between subject and verb. "The quality of the soil samples [was/were] analyzed" — subject is "quality" (singular), answer is "was."

Rule 3: Transitions

Summarize the relationship between sentences in one word before choosing.

Rule 4: Pronoun-Antecedent Agreement

"Each of the candidates submitted [their] application." The SAT accepts "they/their" as a singular gender-neutral pronoun for indefinite antecedents like "each" and "everyone."

Rule 5: Modifiers

An introductory phrase must modify the subject immediately following the comma. "Having interviewed 200 subjects, the filmmakers created..." — not "the documentary was praised."

Rule 6: Parallel Structure

Items in a list must use the same form. "To clock in, complete tasks, and submit a report" — all bare infinitives. Mixing with gerunds (“submitting”) breaks parallelism.

Rule 7: Conciseness

The SAT rewards the most concise correct answer. "Past history," "future plans," and "due to the fact that" are all redundant. When two answers are grammatically correct, the shorter one wins.

Practice These Rules Systematically

Hueprep's SAT grammar practice lets you filter by rule type so you can drill one rule at a time before mixing. It shows detailed explanations for every answer choice, not just the correct one, which accelerates rule internalization significantly.

1. Learn one rule at a time

2. Do 10–15 focused practice questions

3. Review every error — identify the exact step where reasoning broke down

4. Graduate to mixed grammar sets once the rule feels automatic