was doing是什么时态的标志词

　　he management wanted to know what I was doing there

　　管理层想知道我在那里做什么。

　　She didn't always think carefully about what she was doing

　　她对自己在做的事情并不总是考虑得很清楚。

　　He was doing this to make me more relaxed

　　他这么做是为了使我更放松。

　　I was doing quite well, but I wasn't earning a lot of money

　　我干得还算不错，可是挣的钱却不算多。

　　His mind would wander, and he would lose track of what he was doing

　　他会走神，忘了自己正在干什么。