1. 他正在干什么? What is he doing?
解析
他正在吃饭。 He is eating dinner.
他正在哪里吃饭? Where is he eating dinner?
他正在家里吃饭。 He is eating dinner at home.
2. 你想什么时候去? When do you want to go?
3. 他正在等什么? What is he waiting for?
4. 他们正在和谁说话? Who are they talking with?
5. 你们正在谈论什么? What are you talking about?
6. 他们都正在去上学。 They are all going to school.
7. 这儿是一些我的照片。 Here are some of my photos.
8. 谢谢你帮我买这本书。 Thank you for helping me buy this book.
9. family 家;家庭。强调“整体”,是单数;强调“成员”时,是复数。