It 代替動名詞短語時：
We thought it no use doing that.
我們認為那樣做無濟于事。
Our teacher thinks it no good learning without practice.
我們的老師認識光學不實踐是沒有好處的。
It 代替賓語從句時：
I think it very important that we take part in the discussion.
我認為我們參加這次討論是很重要的
Didn't I make it clear to you that I was not coming?
我不是向你明確表示過我不來了嗎？