中考英语语法复习系列之状语从句(时间状从与条件状从)课件20张

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语法大讲堂
时间状语从句
时间状语从句
1. 用法
He eats a hamburger every day.
He eats a hamburger when he goes home every day.
此句时间状语为every day.
此处时间状语由一个句子充当，故称时间状语从句
时间状语从句
2. 分类
2.当……时候：when, while, as
（1）when+延续性/非延续性；但when不可用于主句从句都为进行时的句子，例：
①When my mum was cooking dinner, I arrived home.
（延续性动词）
②Dad was watching TV when I arrived home.
（非延续性动词）
时间状语从句
2. 分类
（2）while+延续性；while还可表对比，例:
①While I was sleeping, a thief broke in.
= A thief broke in while I was sleeping.
②My mother was watching the South Korean TV soap, while my brother was playing games. (两者动作进行对比)
时间状语从句
2. 分类
（3） as强调从句和主句中两个动作交替进行或同步进行；还可表“作为…”例:
①Taylor Swift sang as she went along.
②As he grew older, he became more intelligent.
③As a man, you should take care of your family. （作为...）
时间状语从句
2. 分类
2. until直到…
例：
I won’t leave here until you promise to go shopping with me this weekend. (not…until… +短暂性动词，翻译为直到...才)
I will stay here until you promise to go shopping with me this weekend.（持续性动词）
条件状语从句
条件状语从句
If it doesn’t rain tomorrow, we will go on a picnic.
如果明天不下雨，我们将要去野餐。
定义：由句子充当条件状语(前提条件)
1. 用法
条件状语从句
If he comes to the party, I’ll call you.
如果他出席派对，我将会打电话给你。
2. 分类
两个动作发生了吗？
If he comes to the party, I’ll call you.
从句( ) 主句( )
一般现在时
一般将来时
条件状语从句，时态上一般遵循--主将从现
条件状语从句
适用主将从现的词还有： unless除非, until直到, as soon as一……就, as long as只要，例：
I won’t go to sleep until my dad comes home.
As soon as my dad comes home, I will go to sleep.
As long as my dad comes home, I will go to sleep.
2. 分类
条件状语从句
unless = if… not...
例:
（1）Let's go out for a walk unless you are too tired.
（2）If you are not too tired, let's go out for a walk.
2. 分类
条件状语从句
在谈论将来可能出现的情况时，主句还可以是含有其他情态动词的句子或者是祈使句。
We may go out if it's fine tomorrow.
如果明天天气好的话，我们可能会出去。
Please call me if you go shopping next Sunday.
如果下周日你去购物，请给我打电话。
主情从现
主祈从现
条件状语从句
if 引导的条件状语从句和宾语从句的差别：
1. I‘ll tell you about it if you come. (条件状语从句)
如果你来，我就告诉你关于它的情况。
2. I don’t know if he will help me. (宾语从句)
我不知道他是否会帮助我。
意为“如果”
意为“是否”
条件状语从句
if 引导的条件状语从句和宾语从句的差别：
1. I‘ll tell you about it if you come. (条件状语从句)
如果你来，我就告诉你关于它的情况。
2. I don’t know if he will help me. (宾语从句)
我不知道他是否会帮助我。
时态遵循--主将从现
时态受主句谓语动词影响
条件状语从句
【例1】If your friend ______，I'll tell you.
A.come B.will come C.comes D.are coming
【例2】I want to know if they______ tomorrow.
A.come B.will come C.comes D.came
解析：此为条件状语从句，时态遵循主将从现，答案选择C。
解析：此为宾语从句，时态主现从不限规则，从句中有tomorrow,故为一般将来时，答案选择B。
巩固练习
1.You can’t get good grades ________ you work hard from now on.
A. after B. unless C. while D. since
2.She will sing a song ________ she is asked.
A. if B. unless C. for D. since
3.---Do you know when the teacher ________ back tomorrow
---Sorry, I don‘t know. If he ________ back, I’ll tell you at once.
A. comes; comes B. comes; will come
C. will come; comes D. will come; will come
4.I won’t believe that the five-year-old boy can read magazine _________ I test him myself.
A. if B. when C. after D. until
5.While she ________ TV in the sitting room, the bell________.
A. watches; rings B. is watching; rang
C. was watching; rang D. watched; was ringing
完成句子。
1.假如你不从现在开始努力学习，你的一生都会感到遗憾。
You ____________ ____________ ashamed all your life if you ____________ ____________ hard from now on.
2.昨晚我直到完成任务才从办公室出来。
Last night I ________ ________ out of the office ________ I ________ the task.
3.如果你现在不出发，你就会错过末班车。
_________you don’t leave now, you __________________ the final bus.
4. 除非他放弃比赛，不然他肯定会获奖。
He is sure to get a prize _________ he __________________ the competition.
will feel
don’t
study
didn’t come until finished
If will miss
unless gives up
谢谢观看！