仁爱版英语八年级下册Unit6_Topic2_语法专项课件(时间状语从句)

易错点3 when/while/as的区别 as:
1. She came up as I was cooking.（同时） 2. The runners started as the gun went off.（几乎同时）
易错点3 when/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）
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），until（直到……才/为止)，till （直 到……才/为止)。
时间状语从句的分类
It’s 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 o’clock.
初中英语仁爱版八年级下册
Unit6 Topic2
语法专项课件 （时间状语从句）
状语从句大观
条件状语
结果状语
地点状语
目的状语
原因状语 时间状语
比较状语
方式状语 让步状语
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。
A. arrives
B. arrived
C. is arriving
D. will arrive
考查时间状语从句连接词。句意：亨利一回来就给 我们作报告。as soon as为时间状语引导词，遵循 “主将从现”原则，故答案选A。
【典例1】I didn’t 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。not…until直到……才，固定 搭配，答案选D。
【典例2】Henry will give us a report as soonas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。
主祈
从现
易错点2 until/till的区别
until
till
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。
用于否定句，构成 “not…until”结构，意为 “直到……才”。
不可用于句首。 无此用法。
易错点2 until/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 yesterday, I knew I was wrong. He didn't go to sleep until 12 last night. He didn't go to sleep till 12 last night.
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1
Once you see her, you will never forget her.
从现
主将
Please call me as soon as you arrive America.
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.
易错点3 when/while/as的区别
while:
1. When ／While ／As we were dancing，a stranger came in. （dance为延续性动词） 2. Please don’t talk so loud while others are working. （work为延续性动词）
时间状语从句的分类
Mary cut her finger when she was making a kite. Once you see her, you’ll never forget her. As she was reading the newspaper, grandma fell asleep. Work while you work. Play while you play.