把下列句子改成否定句,一般疑问句,并给肯定回答,否定回答1.He was in the station yesterday2.I was a student three years ago3.They swam in the river yesterday4.He bought a wallet yesterday5.Li Ming and Wang Ming was in the shop just now6.Those doctors went to visit Shanghai last month

1. He was not in the station yesterday.
Was he in the station yesterday?
2.I was not a student three years ago.
Was I a student three years ago?
3.They didn't swim in the river yesterday.
Did they swim in the river yesterday?
4.He didn't buy a wallet yesterday.
Did he buy a wallet yesterday?
5.Li Ming and Wang Ming was not in the shop just now.
Was Li Ming and Wang Ming in the shop just now?
6.Those doctors didn't go to visit Shanghai last month.
Did those doctors go to visit Shanghai last month?

1.He was not in the station yesterday. Was he in the station yesterday? -Yes, he was./No, he wasn't.2.I was not a student three years ago. Was I a student three years ago? -Yes, I was./No, I wasn'...