Grammar Toolkit
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English (US)
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Grammar Reference
Subject-Verb Agreement
Ensure your subjects and verbs match in number. Singular subjects take singular verbs.
Semicolons vs Commas
Learn when to use semicolons to connect related independent clauses instead of commas.
Perfect Tenses
Master present, past, and future perfect tenses to express completed actions accurately.
Double Negatives
Avoid using two negative words in the same clause, which creates unintended meanings.
Passive vs Active Voice
Use active voice for direct, dynamic writing. Reserve passive voice for specific contexts.
Run-on Sentences
Learn to properly punctuate fused sentences and comma splices to improve readability.