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Top Grammar Mistakes That Kill Your TOEFL Score

USpeak Team August 1, 2025 TOEFL Preparation

Introduction

Grammar can make or break your TOEFL score, especially in the Writing and Speaking sections. Even advanced learners make frequent errors that cost valuable points. Let’s explore the most damaging grammar mistakes and how to fix them.

1. Subject-Verb Agreement

Incorrect: "He have a car."
Correct: "He has a car."

Always match singular subjects with singular verbs and vice versa. This is one of the most tested grammar rules in TOEFL.

2. Misuse of Tenses

Switching between tenses is a major error. Stick to one timeline. If you're narrating a past experience, keep it in past tense.

3. Run-on Sentences

Don’t string ideas with just commas. Break long sentences with periods or use conjunctions like “because” or “although.”

4. Articles and Determiners

Many learners omit “a,” “an,” or “the.” For example, say “a university,” not “university.”

5. Word Order

In questions, use correct word order: “Where are you going?” instead of “Where you are going?”

Conclusion

Awareness and correction of these mistakes can significantly improve your TOEFL performance. Keep practicing with mock tests and grammar correction tools to refine your skills.

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