他们一直忙于做作业.的英文是什么?

问题描述:

他们一直忙于做作业.的英文是什么?

They are/were busy doing their homework all the time.

什么啊····
是They were busy doing their homework才对吧
一堆机翻···

They are busily doing homework all the time.

they're busy working all the time

They have been still busy on their homework.

They have been busy with their homeworks.

They have been busy with homework

They have been busy doing homework.

They have been busy for doing their homework.