Đổi sang câu nghi vấn và phủ định những câu sau đây:

1. They needed a good book.

2. I would like to go to the zoo.

3. She may be right.

4. My sister always goes to school on time.

5. He put it on the chair.

6. They have had lunch already.

7. She had to meet her mother.

8. They’d have cut it if they had wanted.