1/41初二语法(四)状语从句一、定义二、分类及引导词状语从句的分类从句的引导词例句时间状语从句when/while/as,before,after,since,not⋯until,assoonasIwasdoingmyhomeworkwhenmymothercamein
条件状语从句if,aslongas,unless(除非)Unlessweatherstopsme,Igoforawalkeveryday
原因状语从句because,since(既然),as(由于),for(由于)Sinceeveryoneishere,let’sbeginourmeeting
目的状语从句sothat,inorderthatHegetsupearlyeverymorningsothathecancatchthebus结果状语从句sothat,so⋯that/such⋯thatIt’ssohotthatnobodywantstogoout
让步状语从句though/although/,evenif,whatever,wherever,wheneverWhereveryougo,Iwillgowithyou
比较状语从句than,as⋯as,notas/so⋯asHeisastallasTom
地点状语从句whereSitwhereyoulike
三、具体用法1
时间状语从句(1)主将从现:assoonas,when,until(2)when引导的时间状语从句,主句用过去进行时(3)until/till:①主句的谓语动词是延续性动词,主句用肯定形式:eg
I’llwaitforyoutill/untilyoucometoseeme
②主句的谓语动词是非延续性动词,主句用否定形式(never,nothing):eg
Ididn’tgotobeduntilIfinishedmyhomework