1. She has no idea of what the book is about. She can’thave read it carefully.

2. —Would you like some milk？—Yes, just now.

3. Lily is coming.

4. I’m speaking English.

5. She is not drinking water.

6. Is she drinking water now？

7. Yes, she is./No, she isn’t.

8. He is reading a book.

9. She is listening to music.

10. The cat is sleeping under the bed.

11. We are cleaning our classroom.

12. They are playing football on the playground.

13. Look! She is singing an English song.

14. Listen! She is singing an English song.

15. He is watching TV.

16. No, Jack is doing his homework in the classroom.

17. He is studying hard.

18. The boat is passing under the bridge.

19. They are playing basketball now.

这些句子展示了现在进行时的不同用法，包括描述当前正在发生的动作、表示将来时间（通过某些动词如go, come, leave, arrive等表示）以及用于强调正在进行的动作。希望这些例子能帮助你更好地理解和掌握现在进行时的用法。