214+ free practice questions
SAT Grammar Practice
Master every grammar rule tested on the digital SAT. Adaptive questions that adjust to your level — no account needed to start.
214+
Practice questions
12
Grammar rules covered
94%
Score improvement rate
Question 1 of 214+
PunctuationQ1
The researcher spent three years studying the migratory patterns of monarch butterflies ______ her findings challenged several long-held assumptions about their navigation abilities.
Which choice most effectively combines the two parts of the sentence?
SAT Grammar Rules You Need to Know
The digital SAT tests these 12 grammar concepts repeatedly. Master them and you've cracked the Writing section.
Rule 01
Punctuation & Commas
When to use commas with clauses, lists, and introductory phrases.
Rule 02
Subject-Verb Agreement
Verb must match the subject — watch out for intervening phrases.
Rule 03
Transitions
Choosing the right connector: however, therefore, furthermore.
Rule 04
Pronoun Agreement
Pronouns must agree with their antecedent in number and person.
Rule 05
Modifiers
Dangling and misplaced modifiers — keep them next to what they describe.
Rule 06
Parallelism
Items in a list or comparison must share the same grammatical form.
Rule 07
Verb Tense & Mood
Consistency in tense across a passage, and when to use subjunctive.
Rule 08
Apostrophes
It's vs its, whose vs who's, and forming possessives correctly.
Rule 09
Colons & Semicolons
Semicolons join independent clauses. Colons introduce lists or explanations.
Rule 10
Conciseness
Eliminate wordy or redundant phrasing — the SAT rewards brevity.
Rule 11
Sentence Boundaries
Avoiding run-on sentences and sentence fragments.
Rule 12
Words in Context
Choosing the word that best fits the meaning and tone.