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Exercise 1: Chia động từ ở các câu sau đây.
1. They (go) ……………..home after they (finish) ………………… their work.
2. She said that she (already, see) ……………………. Dr. Rice.
3. After taking a bath, he (go) ………………………….. to bed.
4. He told me he (not/eat) ………………………… such kind of food before.
5. When he came to the stadium, the match (already/ begin) ………………………………….
6. Before she (watch) ………………….. TV, she (do) ………………. homework.
7. What (do) …………….. he before he went to the airport?
8. After they (go) ………………………, I (sit) ……………….. down and (watch)…………..TV
9. Yesterday, John (go) ………………….. to the store before he (go) ………………… home.
10. She (win) ………………………. the gold medal in 1986.
Exercise 2: Viết lại câu dựa vào những từ cho sẵn.
1. David had gone home before we arrived.
=> After…………………………….
2. We had lunch then we took a look around the shops.
=> Before……………………………………………………
3. The light had gone out before we got out of the office.
=> When…………………………………………………………………………………….
4. After she had explained everything clearly, we started our work.
=> By the time …………………………………………………………………………….
5. My father had watered all the plants in the garden by the time my mother came home.
=> Before………………………………………………………………………………….
Exercise 3: 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.
