Common English Grammar Mistakes and How to Fix Them

June 25, 2026

Every English learner makes grammar mistakes. The good news is that most mistakes follow patterns you can learn to recognize. Here are the most common grammar mistakes and simple fixes.

1. Subject-Verb Agreement

The subject and verb must match in number. "He go" should be "He goes." "She don\'t" should be "She doesn\'t." Use the Grammar Checker to catch these errors in your writing.

2. Commonly Confused Words

Your vs You\'re: "Your" shows possession. "You\'re" means "you are."

There vs Their vs They\'re: "There" is a place. "Their" shows possession. "They\'re" means "they are."

Its vs It\'s: "Its" shows possession. "It\'s" means "it is."

3. A vs An

Use "a" before consonant sounds and "an" before vowel sounds. "A university" (starts with "yoo" sound). "An hour" (silent h). Our Grammar Checker can help you spot mistakes.

4. Double Negatives

Avoid using two negatives in one sentence. "I don\'t have nothing" should be "I don\'t have anything." "I can\'t hardly" should be "I can hardly."

5. Common Phrase Errors

Use "different from" not "different than." Use "based on" not "based off of." These small changes make your English sound more natural.

How to Check Your Writing

Use the Grammar Checker to find these mistakes in your writing. Combine it with the Readability Checker and Word Counter for a complete writing review.

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