They can’t have been doing their homework,能不能改成下面句子
They can’t have been doing their homework,能不能改成下面句子
They can't have been doing their homework
They can’t have been doing their homework ---doing是什么词性?have
They have been doing their homework
They can't have been doing thier homework.have been 是现在完成时,但
They have finished doing their homework(改写句子)
they don't doing their homework now.
They have finished doing their homework.Their homework _ _ _
Don't have your children______for hours doing their homework
They are doing their homework?对doing their
关于can't have been的句子
they were doing their homework when I came in.对画线句子提问 ______