Grammar Rule Reference
Quick reference for grammar rules
Grammar Rule Reference
Common grammar rules.
Subject-Verb Agreement
Singular subjects take singular verbs. Plural subjects take plural verbs.
Tense Consistency
Keep the same tense within a paragraph unless indicating a time shift.
Comma Usage
Use commas to separate independent clauses joined by conjunctions (and, but, or).
Apostrophes
Use for contractions (it's) or possession (John's). NOT for plurals.
Who vs Whom
Who = subject. Whom = object. "Who called?" vs "To whom did you call?"
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