Question

to do，to be doing ，to have done区别

Answer 1

三者的主要区别为动作的完成状语不同：　

1.to do强调去做，但还没做，例：
I have something to do tomorrow.
明天我有些事情要去做．

2.to be doing 强调正在做，例：
Everyone seems to be doing it.
每个人似乎都在这样做。

3.　to have done强调的是动作为完成时，例：
They ought to have done something and they haven't.
他们事前应该做一些事情而他们却没有。

Answer 2

to do 不定式的一般式
to be done 一般是的被动
to be doing 一般式的进行时
to have done 不定式的完成式
to have been done 不定式完成式的被动