Turn the sentences into negative and interrogative forms 1. They were in Rio last summer. 2. We did our exercise this morning. 3. My parents came to visit me last July. 4. The hotel was very expensive. 5. I had a bicycle when I was young. 6. The children went to the zoo yesterday. 7. Ernie ate the last doughnut. 8. They bought a new house last month.  

Để chuyển câu thành dạng phủ định (negative) và câu hỏi (interrogative), bạn cần chú ý đến các quy tắc chuyển đổi như sau:

- Đối với các câu khẳng định: để chuyển sang dạng phủ định, thêm "not" hoặc "didn't" vào trước động từ. Đối với câu hỏi, đảo vị trí giữa chủ ngữ và động từ.

Ví dụ:

1. They were in Rio last summer.
- Negative: They were not in Rio last summer.
- Interrogative: Were they in Rio last summer?

2. We did our exercise this morning.
- Negative: We did not do our exercise this morning.
- Interrogative: Did we do our exercise this morning?

3. My parents came to visit me last July.
- Negative: My parents did not come to visit me last July.
- Interrogative: Did my parents come to visit me last July?

4. The hotel was very expensive.
- Negative: The hotel was not very expensive.
- Interrogative: Was the hotel very expensive?

5. I had a bicycle when I was young.
- Negative: I did not have a bicycle when I was young.
- Interrogative: Did I have a bicycle when I was young?

6. The children went to the zoo yesterday.
- Negative: The children did not go to the zoo yesterday.
- Interrogative: Did the children go to the zoo yesterday?

7. Ernie ate the last doughnut.
- Negative: Ernie did not eat the last doughnut.
- Interrogative: Did Ernie eat the last doughnut?

8. They bought a new house last month.
- Negative: They did not buy a new house last month.
- Interrogative: Did they buy a new house last month?

Bạn có thể sử dụng các quy tắc trên để chuyển các câu từ bài tập thành dạng phủ định và câu hỏi.