时间状语从句:表示时间性质的状语从句例句：It'sfiveyearssinceh.. 精选答案
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）
