翻译汉语成英文~1,昨天早上九点钟你在干什么?2,当李雷在吃早饭时,吉姆进来了.3,不明飞行物起飞时,小明正在骑自行车.

1. What were you doing on yesterday morning, 9 O'clock.
2. Jim came in when Li Lei was having breakfast.
3. Xiao Ming was riding a bicycle when the UFO started flying.
4. At that time, they were doing homework.
5. We were talking on the phone when Mom came in.
以上所有句型都是练习“过去进行时”的,非常常见也是非常重要的句型.请务必掌握.祝你好运.