1 He/I was working in the garden while I/he was cooking dinner .
2 What were you doing while I was watching TV?
3 The phone rang as I was just opening the door.
4 We have already been to Shanghai three times .
如果不明白,请再问;如果对你有所帮助,
请点击本页面中的“选为满意回答”按钮,第一题那个人称都可以用?对,前面是I, 后面就用he,反之,前面用He,后面就用I
