Всі типи запитань до речення-We were doing homework at 4 yesterday

We were doing homework at 4 yesterday.

1) Were we doing homework at 4 yesterday?

2) We were doing homework at 4 yesterday, weren't we?

3) Were we doing homework at 4 or 6 yesterday?

4) What were we doing at 4 yesterday?

5) Who was doing homework at 4 yesterday?