精品文档---下载后可任意编辑2024-2024 学年第四册Unit3TheworldmeetsChina 突破语法大冲关学案 Unit 3 The world meets China 状语从句 状语从句一般分为九种,它们是:时间状语从句; 地点状语从句; 原因状语从句; 条件状语从句; 目的状语从句; 结果状语从句; 方式状语从句; 让步状语从句; 比较状语从句。 一、时间状语从句; 地点状语从句; 原因状语从句; 条件状语从句 [观察例句] 1.We should go where the Party needs us most. 2.The last time she saw James,he was lying in bed. 3.If you see him,give him this note. 4.It will not be long before we meet again. 5 .I have written home four times since I came here. 6.Now that everybody is here,let's begin our meeting. [归纳用法] 1.引导时间状语从句的有:(1)as ,after,before,directly,immediately,once,since,till,until,when,while,whenever 等连词。(2)as soon as,the moment/minute , every time , each time , next time , the first/last time,any time,by the time,the day/year 等短语。 2.引导地点状语从句的有:where,wherever,everywhere,anywhere 等连词。 3.引导原因状语从句的有:because,as,since,now that等连词。 4.引导条件状语从句的有:if,unless,as/so long as,in case,on condition that,provided/providing(that),supposing/suppose(that)等连词。 [名师点津] 1.when,while 与 as 引导的时间状语从句的区别 连词 从句谓语动词 用法 when 延续性动词、非延续性动词 从句的动作和主句的动作可以同时发生,也可以先后发生 while 延续性动词 从句的动作与主句的动作同时发生 as 延续性动词 强调主从句动作相伴发生,可译为“一边……一边……;精品文档---下载后可任意编辑 随着” 与 since 的常用句式 连词 词义 常用句式 before 在……之前,还未……就……; ……才……; 趁……,还没来得及…… (1)It will(not)be+一段时间+before...“(没有)过……(时间)才(就)……” (2)It was not long before...“ 不 久 … … 就 … … ” (3)It was + 时 间 段 +before...“过了……(时间)才……” since 自从……以...