什么叫做时间、条件状语从句?顺便多举几个例子

时间状语从句:表示时间性质的状语从句
例句：It's five years since he smoked他吸烟已经有5年了(since he smoked是时间状语从句)
引导词有：when,as,while,before,after,since,till/until,as soon as,once,whenever,so(as)long as,by the time,each time,every time,immediately等.另外还有：hardly...when,no sooner...than
条件状语从句：表示条件或要求性质的状语从句
例句：
1）I can lend you the bike on condition that you return it on time我可以把自行车借给你,但条件是你必须限期归还(on condition that you return it on time是条件状语从句)
2）You'll fail if you don't work hard如果你不努力就会失败(if you don't work hard是条件状语从句)
引导词有：if,unless,so(as)long as,on condition that(只要）等.
最后,希望你能熟练掌握其用法.

时间状语从句和条件状语从句都是状语从句。不同的是前者是表现时间，后者表现条件。
时间状语从句：i'm working hard when he is playing.
条件状语从句：i will go boating if it doesn't rain tomorrow.
这里要指出一点，状语从句有一点要注意，就是当主句是将来时，从句要用一般现在时。...