我会和你一起去，条件是我们午夜前回来。

I'll come with you ___on ___condition ___that we're back before midnight.

我想这样做，条件是你不会在网站上提到我的名字。

I would like to do this ___on ___condition ___that you will not mention my name on the website.

你可以借我的车，条件是你明天还回来。

You can borrow my car ___on ___condition ___that you return it by tomorrow.