一轮复习状语从句讲解

1、时间状语从句when引导的句子中表示的动作可以与诸句动作同时发生，也可以先后发生，when可以指时间点也可以指时间段,动词可以用延续性也可以非延续性1 当时，在.期间when i grow up, i will become a beautiful butterfly.when i was a child, i used to go to the seashore.2 表示突然性 这时，那时，用作并列连词主要用于三个句式（1）sb was doing sth whenwe were having our classroom when the earthquake happened.(2) sb

2、. was about to do/ going to do /on the point of doing sth. wheni was about to go out when the telephone rang.(3) sb. had (just) done sth wheni had left our school when it began to rain.while1 当时（when/as）从句表示的动作与主句表示的动作同时发生，只能表示持续性的动作或者状态，使用延续性动词we were visiting the park while our parents were doing

3、the picnic. while you are in the teachers office, bring me some paper.2 然而 表示对比he is watching tv while his brother is reading.3 引导让步状语从句, 位于句首，意为尽管，虽然，相当于though/althoughwhile we have different opinions, we are still good friends.as 1 一边 一边，随着as time goes on, we are becoming stronger and stronger.2 方

4、式状语 按照do as you are told, or you will be fired.do as you are told, and you will make progress.when you are in rome, do as the romans do.3 引导让步状语从句必须形式倒装 结构：adjadvnvdoneas主语be情态动词助动词Young as he is, he has read lots of books and known many languages.Child as he is, he is very clever.如果从句是系表结构，而且表语是单数的

5、可数名词，倒装时名词前不加冠词。Much as i love you, I cant merry you.Try as he might, he couldnt solve the problem.4 原因状语 因为一就1 as soon as 2 the moment/instant/minute/second3 instantly/immediately/ directlyeg: The moment i saw you, i want to smile.*4 hardly/scarcely had sb done when sb didno sooner had sb done than

6、 sb did.eg: Hardly had i got to home when the phone rang. No sooner had he arrived at the airport than the plane took off.5 on doing/ on ones +neg:On arriving the station, he was spotted by the police.On his arrival, he was recognized by the police and then was put into prison.before1 介词doingbefore

7、going to school, he drank some milk.2 ago 只用于过去式 时间段ago he is awarded the prize a month ago.3 before+时间点，可用于各种时态he got to school before 6 oclock.4 before单独使用，一般和现在完成时i have never seen you before.i never saw him before.5 段时间before+过去完成时i had been in HK with its choking smog a few hours before.常用句型1 i

8、t was +段时间before 过了多久才it wasnt +段时间before 2 it will be +段时间before+句子 还要多久才it will not be +段时间before+句子3 before sb can/could do, +句子 还没来得及.就4趁着（还没有）write down the sentence before you forget it.lets go right now before it rained hard.eg:it was a long time before he helped me.it will be a long time bef

9、ore we graduate from college.before i could say a word, she had rushed out.write down the sentence before you forget it.lets go right now before it rained hard.until直到.为止（肯定句）直到.才（否定句）eg:she looked after her daughter until she felt better.he didnt go home until he finished the work.注意：1 not until位于句

10、首，句子倒装，后倒前不倒not until he finished the work did he go home.2 it is /was not untilthatit was not until he finished the work that he went home.each time/every time/ the first time/ next time/ last time/any time等以time结尾的短语可以做连词the first time i went to high school, i felt excited and nervous, but now, ea

11、ch time i went to high school, l felt upset. 注意：for the first time 做状语 the first time 连词 the first time i saw her, i fell in love with her.i saw her for the first time.since1 since +过去时，主句 现在完成时ever since 1）可以引导句子since2）单独使用 从那以后eg:since you entered high school, you have made great progress.since yo

12、u began to recite words and expressions in the dictionary, you have learned 3300 words.2 it is /has been +段时间since+过去时句子 自从.已有多久eg：it is /has been 10 years since i last saw her.3 since+延续性动词 自从 since+非延续性动词 自从不eg: it is two years since he left home. 自从他离开家已经两年了。it is two years since he lived here.他不

13、住在这里已经两年了。4 since 介词（自从）he has been a top student since 1999. 5 since引导原因状语从句since it is raining, lets stay at home.原因状语从句because/ since/as/ for /now that不能用！ 1 不能和so连用 because he was ill, so he didnt go to school.2 because 可以回答why提出的问题，别的不可以 why didnt you phone me last night?because i have somethin

14、g important to deal with.3 强调句it is/was because that+其他成分it is because he was ill that he didnt go to school. 4 because 引导表语从句it /that/this is /was becausethe boss scolded him. that is why he was upset. 区分：there was something wrong with his car. that is why he was late for the meeting.地点状语从句where/ w

15、herever/anywherewherever you go, whatever you do, i will be right here waiting for you.区分定从：where引导定从，从句前有一个表示地点的名词作先行词，而状语从句前没有先行词The park is a great place where you can enjoy yourself quietly.Where there is a will, there is a way.We must stay where we are happy.Go back where you came from.Go back

16、to the village where you came from.We went home, where we have dinner.条件状语从句 1if 如果If there is a fire, you should call 119.2 in case (that) 以防万一 We should prepare more paper, in case that we write a lot.You should bring your paper in case it rains.3 unless (if not)除非He is sure to help us unless he i

17、s very busy.= He is sure to help us if he is not busy.4 as/ so long as 只要You will gain much knowledge as long as you keep on reading.5 on condition that 条件是I will lend you the car on condition that you send it back on Sunday.6 suppose/supposing假设Supposing it rains, what will you do?7 providing/provi

18、ded 假设I shall go provided that it doesnt rain.I will go provided that you treat me.Providing that i have lots of money, i will buy you a splendid villa.方式状语从句1 as 像.一样 just as 正像 as if /as though 好像do as i do.i have changed the plan just as you told me.he stood up as if he wanted to leave.the 100-ye

19、ar old man speaks fluently as if he were a young man. 让步状语从句1 though /although/as /while注意：1）although 不倒，though可到可不倒，as 不能倒2）与but不连用，但是可以与yetstill连用，加强语气3 ）while 做尽管，虽然，必须位于句首Although he is young, yet he knows a lot.Though he is young, he still knows a lot.Young though he is, he knows a lot.You

20、ng as he is, he knows a lot.Child as he is, he knows a lot.2 no matter+wh-= wh-ever+句子however+adj/adv+句子You cant come in, whoever you are.You cant come in, no matter who you are.However/ no matter how long it takes, we will have to finish the job.However hard he worked, he couldnt solve the problem.

21、对比：I will give the prize to whoever win the first.3 even if /even thougheven if you love me so much, i cant promise to love you.4 whetheror不管还是.whether you like it or not, it is going to happen.5 whilewhile i like its color, i dont like its style.6 despite +nin spite of+n 虽然 尽管anyhowanyway不管怎样结果状语从句

22、so thatsothatsuchthat1 he got up early so that he caught up the first bus.结果he got up early so that he could catch up the first train. 目的2 so that suchthat1)so adj adv +that adj+a(n)+单数cneg: when i was first on the stage, i felt so nervous that i shook like a leaf.he ran so fast that i couldnt catch

23、 up with him.he is so clever a boy that we all like him.2)so many/few +c.n.复数that so much/little+u.n.+thatthere are so many people in the hall that i cant see her.we have so much knowledge to learn that we should study harder.3)such+a(n) +adj +c.n. 单数+thatsuch+adj+c.n.复数+thatsuch+adj+u.n.+thateg:he is such