初中语法复习：状语从句等

3.条件状语从句
由if（如果）, unless（if...not，除非）, so/as long as （只要）等引导，谈论的是一个有可能发生的事实及其 产生的相关的结果，主句用现在时，从句也用现在时； 主句用过去时，从句也用过去的某种时态。 主将从现具体地讲，主句是一般将来时(包括祈使句和含 有情态动词can, may, must等)，从句也用一般现在时。 ①
第一部分 中考英语语法专题
专题十五 状语从句
用一个句子充当状语成分，那个句子 就是状语从句。
• 状语从句 • 状语从句同副词，介词词组等作状语一样，用
于修饰谓语，说明谓语动作的时间，地点，方 式，手段，条件，程度，比较，原因，目的， 结果等
1. I get up at 6:00
2. It is dark
happily. __W__h_i_l_e_____ she was typing the letter,the
telephone rang when， as， while区别
①when ②while ③as
"时间点" "终止性动词" "时间段" "延续性动词" “一边..........一边”
as soon as --- 一……就……
Байду номын сангаас
back.
A. until B. before C. after D. while
5. John fell asleep ________ he was listening to the music.
A. after B. before C. while D. as soon as
2. 地点状语从句
America.
A. when B. before C. since D. after
3. We won’t leave here _______ our teacher comes back.
A. until B. since C. after D. as soon as
4. I had to finish the picture ________ my mother came
It won’t be half a year before we meet again.
③it won’t be +一段时间+ before...不久就....
We sailed four days and nights before we saw the land.
※till, until和not…until：
B. don’t come
C. didn’t come
If you _______ him tomorrow, please ask him if he
如果______ to work on the farm with us.
是否
A. see ; goes B. will see; goes C. will see; will go
＊两个动作同时发生
As the day went on, the weather got worse.
__W__h_e_n______he had finished his homework， he took a short rest． ___A_s________he walked along the lake， he sang
Because it rained hard, we stayed at home. 或
It rained hard, so we stayed at home.
because of和because的区别⑥
① because of后加名词代词或动名词，不 加句子，而because加句子，例：
• Because of his illness, he didn’t go to work.
地点状语从句由 where, wherever 等引导。例 如：
•You can take a walk wherever you like to. • ---Mom, what did your doctor say?
--- He advised me to live where the air is fresher.
1.until/till引导时间状语从句用于肯定句时，主句 的动词是延续性动词，表示动作或状态一直持续 到until/till所表示的时间，意为“某动作一直延 续到某时间点才停止”。如：
We waited until he came.
2．用于否定句时，主句谓语动词是非延续性动 词，从句为肯定，意为“某动作直到某时间才开 始”,如:
D. see; will go
总结： 条件状语从句考的频率比较高，主要考查if 连词和if引导的从句与主句的时态（主将从现）
4.原因状语从句
原因状语从句通常由because, as, since, 等词引导。 because语气较强，用以回答why问句。④ －Why are you late again today? －Because I've got a bad cold. as语气较弱，较口语化，所表示的原因较明显。 As I didn’t know the way, I asked a policeman. since语气较弱，常表对方已知的事实，相当于汉语的
It is five years since we met last time. It has been ten moths since we graduated.
※ before ① 在……前 It will be half a year before I come back.
②it will be +一段时间+ before...多久之后才...
3. I get up when it is dark
1.时间状语从句
I was watching TV a--t--t-e-n---o-'-c-l--o-c↓-k--y--e-s-t-e-r--d-a-y.
时间状语 I was watching TV when my mother got home.
在忘记之前,我要把它写下来。 I’ll write it down before I forget it. 我一到上海就会写信给你。 As soon as I arrive in Shanghai, I will write to you. 我们一直到雨停了才离开。 We didn’t leave until the rain stopped.
“祈使句 + and （or）+ 结果句” ③ = 条件状语从句 Hurry up, or you'll be late. =If you don't hurry up,you'll be late. Study hard and you will pass the exam. =If you study hard, you will pass the exam.
He said he would tell her about it when he saw her.
while:在……期间，往往指一段时间,从句中 一般用持续性动词作谓语。
She fell asleep while she was reading the
newspaper. while有时可以作并列连词，表示对比，可译 成……而……。 I am fond of English while he likes maths.
He won’t go to bed till/until she returns.
练习 :
时间状语从句
1. I’ll write to you _______ I get there.
中考题型
A. while B. before C. as soon as D. by
2. He has lived in the city _________ he came back from
---------------↓-------------
时间状语从句
1. 时间状语从句的引导词：
when（当……时候）, while（当……时候）, before （在……之前）, after（在……之后）, till/ until（直 到）, as soon as （一……就……）， as（当……时,一 边……,一边……）, since（从……以来）, by the time （当……时候）等引导。
----- ______ I watched the football World Cup
√ until 12 o’clock last night. A. If B. Because C. Since D. Though
条件状语从句
中考题型
You’ll be late ______ you don’t get up early
tomorrow morning.
A. if B. when C. before D. until
If he ______ on time, we will go without him
A. doesn’t come
We won’t wait for him, if he doesn’t come before 12o’clock. We won’t wait for him, unless he comes before 12o’clock.
So long as you keep on trying, you will surely succeed.
Jack went to school as soon as he got well.
I’ll ring you up as soon as I get an answer from him.