She cooked yesterday
1) What did she do yesterday?
2) who cooked yesterday?
3) she cooked yesterday, didn't she?
4) when did she cook?
5) did she cook or wash up yesterday?
She was cooking at three o'clock yesterday
1) what was she doing yesterday?
2) who was cooking at three o'clock yesterday?
3) she was cooking at three o'clock yesterday, wasn't she?
4) when was she cooking yesterday?
5) was she cooking or washing up yesterday?