仁爱英语八下UnitTopic语法专项汇总时间状语从句共张讲解

1、Unit6 Topic2 语法专项课件（时间状语从句）初中英语仁爱版八年级下册状语从句大观条件状语原因状语目的状语地点状语比较状语结果状语时间状语让步状语方式状语时间状语从句的分类1. 表示同时性，即主从句的谓语动作同时发生或几乎同时发生。包括：when（当时候），while（当时候），as（当时候），as soon as（一就），once（一旦就）等。时间状语从句的分类Mary cut her finger when she was making a kite.Once you see her, youll never forget her.As she was reading the ne

2、wspaper, grandma fell asleep.Work while you work. Play while you play.时间状语从句的分类2. 表示先后，即主句的谓语动作发生在从句之前或之后。包括：after（在之后），before（在之前）。时间状语从句的分类After we heard the news, we were all excited.We had learned English for three years before he went to London.时间状语从句的分类3. 表示持续或瞬间性。包括：since（自从），ever since（自从），u

3、ntil（直到才/为止)，till （直到才/为止)。时间状语从句的分类Its just a week since we arrived here.Ten years has passed since we left our school.He waited for his father until (till) it was twelve oclock.易错点1在时间状语从句中，要注意时态一致。一般情况下，主句是一般将来时，从句用一般现在时（即“主将从现”或“主祈从现”）；主句是过去时态，从句也要用相应的过去时态。易错点1Once you see her, you will never fo

4、rget her.Please call me as soon as you arrive America.主将从现主祈从现易错点2untiltill用于肯定句，意为“直到某时”，跟时间副词、短语、句子均可。用于句首。不可用于句首。用于否定句，构成“notuntil”结构，意为“直到才”。无此用法。until/till的区别易错点2until/till的区别I worked until/till he came back.The meeting continued until/till 7:00.Until yesterday, I knew I was wrong.Till yesterda

5、y, I knew I was wrong.He didnt go to sleep until 12 last night.He didnt go to sleep till 12 last night.易错点3when/while/as的区别用法as“当的时候”，一般和 when/ while 通用。着重强调主句与从句的动作或事情同时或几乎同时发生。when可以和延续性动词连用，也可以和短暂性动词连用；when从句的谓语动词可以在主句谓语动作之前、之后或同时发生。while从句中的动词一般要用延续性动词。易错点3when/while/as的区别as:1. She came up as I

6、was cooking.（同时）2. The runners started as the gun went off.（几乎同时）易错点3when/while/as的区别when:1. When we were at school, we went to the library every day.（在一段时间内） 2. Sorry，I was out when you called me.（call为短暂性动词）3. When I got to the airport，the guests had left.（got to后发生）易错点3when/while/as的区别while:1. Wh

7、en While As we were dancing，a stranger came in.（dance为延续性动词）2. Please dont talk so loud while others are working. （work为延续性动词）【典例1】I didnt believe he could drive _ he told me. A. once B. while C. since D. until考查时间状语从句连接词。句意：直到他告诉，我才相信他会开车。notuntil直到才，固定搭配，答案选D。【典例2】Henry will give us a report as soon as he _. A. a