on condition that引导的从句

1.on condition that = if,只能引导条件状语从句.
2.that不能省略.
3.该连词引导的主从句的时态也遵循“主将从现”原则.
4.如：
1）I'll come on condition that John is invited too.
如果约翰也受到邀请,我就来.
2）I will lend you the book on condition that you return it on Monday.
如果说你能在星期一还我,我可以借给你这本书.