They were working when she came yesterday
Giải thích
They were working when she came yesterday.
- They weren't working when she came yesterday.
- Were they working when she came yesterday?
Yes, they were./ No, they weren't.
They were working when she came yesterday.
- They weren't working when she came yesterday.
- Were they working when she came yesterday?
Yes, they were./ No, they weren't.