beendoing是什么时态例句

been doing是现在完成进行时， 表示一个在过去开始而在最近刚刚结束的行动，如

Ann is very tired. She has been working hard

安很累。她一直在努力工作

So, what have you been doing today?

那你今天都干什么了？

He\'s been doing the same job for 50 years ─ man and boy.

他从小就干着同一份工作，有50年了。

What have you been doing this week?

你这个星期都在做些什么？

The car must have been doing at least 100 miles an hour.

这车速肯定每小时至少100英里。