**Correct:** The children play soccer in the backyard after school. **Error:** "Plays" should be "play" to match the plural subject "children."

**Correct:** She drives to work every day in her new car. **Error:** "Drive" should be "drives" to match the third-person singular subject "she."

**Correct:** She was happier when she lived closer to her family. **Error:** "More" is redundant with the comparative "happier."

**Correct:** There are five books on the table that belong to you. **Error:** "Is" should be "are" to match the plural subject "books."

**Correct:** The dog runs through the park every morning. **Error:** "Run" should agree with the singular subject "dog" as "runs."

**Correct:** I have an apple in my lunchbox. **Error:** "A" should be "an" because "apple" starts with a vowel sound.

**Correct:** If I were you, I would talk to the principal about the issue. **Error:** In hypothetical situations, "was" should be "were."

**Correct:** He has gone to the gym three times this week. **Error:** "Went" should be "gone" in the present perfect tense.

**Correct:** My mom bought me a useful book about cooking. **Error:** "An" should be "a" because "useful" begins with a consonant sound.

**Correct:** I saw the movie last weekend with my friends. **Error:** "Seen" should be "saw" in the simple past tense.

**Correct:** My brother has two bicycles, but he doesn’t use either of them. **Error:** "Have" should be "has" to match the singular subject "brother."

**Correct:** They were going to the store when it started raining. **Error:** "Was" should be "were" to match the plural subject "they."

**Correct:** She doesn’t know where the library is. **Error:** "Don’t" is incorrect for third-person singular. It should be "doesn’t."