Кто понимает английский помогите

Поставьте глаголы в скобках в утвердительную (+), отрицательную (-), вопросительную формы (?), обращая внимание на указатели времени.
. Were you working around the house at 4 pm yesterday?
2. Jim and Jack are playing football now.
3. Helen will be taking an exam at 2 pm next week.
4. Where will Tom be going at 3 pm tomorrow?
5. His uncle is not writing a letter at the moment.
6. Was Mary sleeping at 4 am last week?
7.Will your friends be riding their bikes at 7 pm tomorrow?
8. l and Tom were not studying at College at 10 am yesterday.
9. My teachers are not having lunch now.
10. The students were doing this exercise at 9 am yesterday.

1.
+ Were you working around the house at 4 pm yesterday?
- Weren't you working around the house at 4 pm yesterday?

2.
+ Jim and Jack are playing football now.
- Jim and Jack aren't playing football now.
? Are Jim and Jack playing football now?

3.
+ Helen is taking an exam at 2 pm next week.
- Helen isn't taking an exam at 2 pm next week.
? Is Helen taking an exam at 2 pm next week?

4.
+ Where is Tom going at 3 pm tomorrow?
- Where is Tom not going at 3 pm tomorrow?

5.
+ His uncle is writing a letter at the moment.
- His uncle isn't writing a letter at the moment.
? Is his uncle writing a letter at the moment?

6.
+ Was Mary sleeping at 4 am last week?
- Wasn't Mary sleeping at 4 am last week?

7.
+ Are your friends riding bikes at 7 pm tomorrow?
- Aren't your friends riding bikes at 7 pm tomorrow?

8.
+ I and Tom were studying at College at 10 am yesterday.
- I and Tom weren't studying at College at 10 am yesterday.
? Were Tom and I studying at College at 10 am yesterday?

9.
+ My teachers are having lunch now.
- My teachers aren't having lunch now.
? Are my teachers having lunch now?

10.
+ The students were doing this exercise at 9 am yesterday.
- The students weren't doing this exercise at 9 am yesterday.
? Were the students doing this exercise at 9 am yesterday?