Mỗi câu sau chứa một lỗi sai. Tìm và sửa chúng

Bài 6: Mỗi câu sau chứa một lỗi sai. Tìm và sửa chúng.

1. Before they came to visit my grandparents, I have already cleaned the house.

2. After Jimmy had gone home, I was doing the shopping.

3. She had come to the cinema before I do.

4. When they arrived, John goes away.

5. I had prepared for the exam and am ready to do well.

6. She had ate dinner before she went to the movie.

7. By the time we arrived, the concert already started.

8. He has left the keys at home when he realized his mistake.

9. They had visited Paris many times, but they never saw the Eiffel Tower.

10. After he had finished his work, he was going for a walk in the park.

11. She had gone to the store and buy groceries for the week.

12. By the time the guests arrives, I had already cooked the dinner.

13. Before she moved to New York, she lived in Chicago for five years.

14. When we arrived at the hotel, our room is already cleaned.

15. He loses his keys, so he couldn't open the door.