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必修2《Grammar》新课标PPT课件优质课下载
I left school when the ending bell rang up yesterday.
它可以修饰谓语、非谓语动词、定语、状语或整个句子。
状语从句一般由连词(从属连词)引导,也可以由词组引起。
从句位于句首或句中时通常用逗号与主句隔开,位于句尾时可以不用逗号隔开。
While John was watching TV, his wife was cooking.
根据其作用可分为时间、地点、原因、条件、目的、结果、让步、方式和比较等从句。
when , while, as , before, after, since, until, till, as soon as, once, hardly…when, no sooner…than, whenever等
分为4类:
1、同时: when , while, as
2、先后: before, after, since, until, till
3、同步: as soon as, once, hardly…when, no sooner…than, whenever
when , while, as , before, after, since, until, till, as soon as, once, hardly…when, no sooner…than, whenever等
分为4类:
1、同时: when , while, as
2、先后: before, after, since, until, till
3、同步: as soon as, once, hardly…when, no sooner…than, whenever
1、同时: when , while, as
都可译成“当---时 ”,更详细地
when:当---时 (通用,指时刻、过程均可)
while:在---期间
as: 随着---(进行、变化)
后二者与某个过程同时,只能接“持续性动词”,其中while多接进行时态
1、同时: when , while, as
当---时 / 在---期间 / 随着---
______ he was walking on the street, a little naughty dog ran up to him.