《状语从句》PPT课件

I recognized him the moment I saw him.
--- Did you remember to give Mary the money you owed her? --- Yes, I gave it to her ______ I saw her.(’01全国春招）
A. while B. the moment C. suddenly D. once
4) Not until all the fish died in the river ___ how serious the pollution was.(NMET95)
A. did the villagers realize B. the villagers realized C. the villagers did realize D. didn’t the villagers
状语从句
状语从句在主从复合句中修饰主句中的动词， 形容词或副词，Βιβλιοθήκη Baidu意义可分为时间、地点、 原因、目的、结果、条件、方式、比较、让 步等状语从句。
从句的位置放在句首，也可放在句末。放在 句首时，从句后面常用一个逗号，放在句末 时，从句前一般不用逗号。
1、时间状语从句：
引导时间状语从句的从属连词有：when, while, as, whenever, before, after, since, till, until, as soon as, once,the moment, immediately, no sooner…than, hardly…when, by the time, every time, last time…等引 导。 （1）when, as, while （从属连词）
*when 可表示“如果”。如：
Don’t be afraid of asking for help_____ it is needed. (’03全国）
A. Unless B. since C. although D. when *while可表示“虽然，尽管”。如：
1)____ modeling business is by no means easy to get into, the good model will always be in demand.(’04浙 江）
By the time he was fourteen, he had taught himself
advanced mathematics.
Each time he came, he would call on me.
You must show him in immediately he comes.
1) Someone called me up in the middle of the night, but they hung up ____ I could answer the phone.(’00全 国） A. as B. since C. until D. before
2) He made a mistake, but then he corrected the situation ___ it got worse.(’03北京） A. until B. when C. before D. as
A. as B. until C. while D. when
3) We were swimming in the lake ____ suddenly the storm started.(’04北京春招）
A.When B. while C. until D. before 4) Jasmine was holidaying with her family in a wildlife
(3)before “在…之前” Before I came downstairs I had prepared myself very carefully for what I must say.
*如果before引导的从句位于主句之后，有时不能译
成“在…之前”，而要译成“就”、“才” 等。如： The struggle lasted four years before the North won in the end. He almost knocked me down before he saw me.
---Yes. He had never praised him _____ he became one of the top students in his grade.(’03春招）
A. after B. unless C. until D. when
③放在句首表示强调时一般用 until。如： Until he returns, nothing can be done.
A. that B. until
C. since
D. before
(4) by the time, each time, every time, immediately, the
moment, the instant, the minute, soon after, shortly
after都可以作为连词，引导时间状语。如：
1) A good storyteller must be able to hold his listeners’ curiosity _____ he reaches the end of the story.(’03上海）
A. when B. unless C. after D. until
2) We were told that we should follow the main road ___we reached the central railway station.(’04辽宁）
（从句动作在前）
as引导持续性动作，侧重主句和从句的动作同 时发生。
He hurried home, looking behind as he went.
I saw your sister as she was getting on the bus yesterday.
He sang as he walked. While：指的是“在某一时间里”，“在… 期间”， 从句里的动作必须是持续性的，它也强调主句和从句 动作的同时发生，往往侧重主句和从句动作的对比。 如：
A. whenever B. until C. while D. wherever
② 如果主句谓语动词是瞬间动词，则用否定式的主 句表示“直到…才”。
如：I didn’t go to bed until (till) he came back. 3) ---Was his father very strict with him when he was at school?
1) I do every single bit of housework____ my husband Bob just does the dishes now and then.(’04广西）
A. since B. while C. when D. as
2) He was about to tell me the secret____ some one patted him on the shoulder. (’02上海）
It was because he was ill that he didn’t go with us. ② because可以引导表语从句,而 as, since不可以， 这时状语一 般都是it, this, that
It’s because he is too lazy.
③ for也表示“因为”，但是并列 连词，它连接的 不是状语从句，语气比较强。
Where there is a will, there is a way.
Where there is too much, the poison and waste may do great harm to the things around us.
1) The famous scientist grew up ____ he was born and in 1930 he came to Shanghai.(’02上海春招） A. when B. whenever C. where D. wherever
2)_____ I accept that he is not perfect, I do actually like the person.(’04江苏）
A. While B. Since C. Before D. Unless
When和while（并列连词），while表示对照的意思。 When 表示“这时，突然…”
While he was in London, he studied music.
While we were watching TV, he was writing a composition.
当when, as, while表示“在…一段时间里”，主从句 的动作同时发生时，可以换用。如：
While (When或As) we were discussing, Mr. Smith came in.
when即可引导持续性动作，又可引导短暂性动作。 它可以表示主句的动作和从句的动作同时发生，或从 句的动作发生在主句动作之前。如：
When I was a boy, I used to go to the seashore on Sundays.（同时）
When the lesson was over, we began our writing.
3) Scientists say it may be five or six years____ it is
possible to test this medicine on human patients.(’04福 建）
A. since B. after C. before D. when
4)It was evening _____ we reached the little town of Winchester.(’04天津）
It must be morning,for the birds are singing.
1) Parents should take seriously their children’s requests for sunglasses ____ eye protection is necessary in sunny weather.(’04上海）
2) She found her calculator _____ she lost it.(’00上 海）
3、原因状语从句：
通常由连词：because, as, since, now that引导。
注意： ① 在强调句中强调原因状语从句，只能用because引导， 不可用as或 since，如：
park____she was bitten on the leg by a lion.(’04上 海） (2)tAil.l和Wuhnetnil B. while C. since D. before ①如果主句谓语动词是持续动词，通常用肯定式 的主句，表示“直到…为止”。如：
I worked till (until) he came back.
注意： 时间状语从句中谓语动词不能用任何 一种将来时，只能用现在时和过去时 表示将来时。
2、地点状语从句：
通常由连词where和wherever引导。如：
Go back where you came from.
Wherever you go, you must write to your parents.
A. because B. though C. unless D. if
2) The changes in the city will cost quite a lot, ____ they will save us money in the long run.(’00全国春招）