1 I was just opening the door as the phone rang.
2 We have already been Shanghai three times.
3 I was cooking the dinner while he was working in the garden.
或者：I was working in the garden while he was cooking the dinner.
4 What were you doing when I was watching TV 请翻译一下~谢谢。1 I was just opening the door as the phone rang.翻译：我正在开门的时候，电话响了2 We have already been Shanghai three times. 翻译：我们已经去过上海3次了3 I was cooking the dinner while he was working in the garden. 或者：I was working in the garden while he was cooking the dinner.翻译：我在做晚饭的时候，他正在花园里工作 或者：我正在花园里工作的时候，他正在做晚饭4 What were you doing when I was watching TV ?翻译：我在看电视的时候，你正在干什么？