什么是条件状语从句？？

有if, unless, as long as连接的状语从句

连接条件状语从句的连接词有：if, unless, as long as.

1 If I am not busy tomorrow, I will play football with you.

2 You won’t pass the exam unless you work hard on it.

3 As long as you take my advice, you will outwit your rival