1、第40课时 状语从句在复合句中用作状语的从句叫状语从句。根据其表达的意思可分为时间、原因、条件、结果、目的、让步、地点、比较、方式等类型。对于状语从句的考查主要涉及以下考点:1状语从句的引导词(表原因、时间、条件、让步、目的、结果等) ;2状语从句的时态。状语从句的引导词类型 引导词 例句时间状语从句来源:学优高考网when/while/as(当时),before(在之前),after( 在之后) ,since(自从),not until(直到 才),as soon as(一 就)I was doing my homework when my mother came in.当妈妈进来的时候我正
2、在做作业。We didnt get off the bus until it stopped.直到公交车停了我们才下车。原因状语从句来源:学优高考网because(因为),since(既然),as(由于 )I like eating apples because its good for my health.我喜欢吃苹果因为它有益于我的健康。条件状语从句 if(如果) ,unless(除非,如果不),as long as(只要)You wont pass the exam unless you study hard.如果你不努力学习,就不会通过考试。结果状语从句 so that(结果是),so
3、/such that(如此以至于)来源:学优高考网He was so tired that he couldnt walk on.他是如此的累,以至于不能继续走了。目的状语从句 so that/ in order that(以便;为了)Miss Lin speaks loudly so that all the students can hear her clearly.林老师高声讲话以便所有的学生都能听清她所讲的。让步状语从句although/though(尽管;虽然),even if/though(即使) ,whatever( 无论什么),whenever(无论何时),however(无论
4、怎样)Although the traffic was heavy,we got to the airport on time.尽管交通很繁忙,我们还是准时到达了机场。地点状语从句 where(哪里 ),wherever(任何地方) Sit wherever you like.坐在你喜欢的地方。来源:学优高考网比较状语从句than(比) ,as as(和 一样),not as/so as(不如 )They often talk more than they do.他们经常说得比做得多。方式状语从句 as(按照),as if/though(好像)Draw a cat as I taught yo
5、u.按照我教你的画一只猫。其他:as long as 只要要注意的几点:(1)because与so,although/though与but 不能同时用在句中。(2)if,when都可引导宾语从句和状语从句,但意义不同,具体如下:意义连词 来源:学优高考网宾语从句 状语从句if 是否 (whether) 如果when 什么时候 当时(3)so that,such that与so that 的用法区别词组 含义 引导的从句 用法sothat so形容词/副词that从句sucha/an形容词不可数名词that从句such形容词可数名词复数that从句such形容词不可数名词that 从句sucht
6、hat如此以至于 结果状语从句such 不可数名词 that从句so that 以便 目的状语从句 从句中常有can,could ,may等情态动词He got up so late that he missed the plane.他起得如此晚,以至于错过了飞机。It is such an interesting book that we all enjoy reading it.这本书如此有趣 ,以至于我们都喜欢看。Its such fine weather that Id like to go out for a walk.天气如此好,以至于我想去散散步。We have moved to
7、 a place close to my parents home so that we can visit them every day.我们把家搬到离父母家很近的地方,以便每天都能去看看他们。(4)“疑问代词/ 疑问副词ever”“no matter疑问代词/疑问副词” ,其意义为“不管/无论该疑问词的本义”,一般可引导两种从句。以whatever为例,whatever引导让步状语从句时,相当于no matter what,且no matter what一般位于句首;whatever也可引导宾语从句。如:Whatever you do,do it well. No matter what
8、you do,do it well.不管做什么,都要把它做好。( 状语从句)With the money,you can buy whatever you want.有了这笔钱,你能买你想买的东西。(宾语从句)【即时训练】用适当的引导词(从属连词)填空。1I didnt accept his help _because_ I wanted to try it myself.2Some people wont realise the importance of their health _until_ they have lost it.3_Although/Though_ he had fai
9、led many times,he didnt give up and succeeded in the end.4Your hearing will be badly hurt _if_ you always listen to music by earphone.5I usually sleep with the window open _unless_ its really cold.6We must get up early _so_that_ we can catch the first bus to school.7I have lost my ID card.I cant rem
10、ember _where_ I last saw it.8He is_ so_ sad that he cant say a word.状语从句与主句时态的一致性1在由when,as soon as,until等引导的时间状语从句和由if,unless引导的条件状语从句中,主句和从句的时态一般分以下几种情况:(1)时态一般遵循“主将从现”原则,即主句用一般将来时 ,从句常用一般现在时表将来。如:If it doesnt rain tomorrow,well go camping.如果明天不下雨,我们就去野营。Ill go to visit my aunt in Hangzhou as soon
11、 as the summer holiday starts.暑假一开始我就去杭州看望我的姑妈。(2)若主句是祈使句或主句中含有情态动词,从句常用一般现在时表将来。如:Please call me if you come to Hangzhou.如果你来杭州,请给我打电话。If you want to attend the party,you shouldnt wear jeans.如果你要出席宴会,就不应该穿牛仔裤。(3)若主句为过去时态,从句用相应的过去时态。如:Judy didnt leave her office until the police arrived.直到警察来了朱迪才离开办
12、公室。2当主从句的动作都发生在过去时,含when/while引导的时间状语从句的主从复合句的时态规律:(1)通常延续性动词用过去进行时,短暂性动词用一般过去时。如:While I was waiting at the bus stop,three buses went by in the opposite direction.我在公交车站等车时,路对面驶过了三辆公交车。When the accident happened,I was walking along the street.当事故发生时,我正沿着街道走。(2)若从句由while引导,且主从句表示的是同时进行的两个持续性动作 ,主从句都
13、用过去进行时。如:He was reading while I was writing.当我在写作时他在看书。3若主句为现在完成时,since引导的时间状语从句常用一般过去时(包括“It has been/Its一段时间 since从句 ”句型) 。如:Ive had this toy bear since I was six years old.自从我六岁起,我就拥有这个玩具熊了。It has been three years since he left his home town.他离开家乡三年了。【即时训练】用括号内所给单词的适当形式填空。1Ill join you as soon as
14、 I _finish_ (finish)my homework.2If we dont take environmental problems seriously,the earth _will _be_ (be)worse and worse.3We were about to start when it_began_ (begin)to rain.4My sister was writing an email while I _was_watching_ (watch)TV at this time yesterday.5Its ten years since we last _saw_
15、(see)each other.,过关检测.用适当的引导词(从属连词 )填空。1Did you say anything to your parents _when_ they shouted at you?No,I was afraid to talk back.They looked really serious and scary.2We will have a football match_if_ we dont have any classes next Friday afternoon.3Shall we go now?No,lets wait _until_ the rain s
16、tops.4Mr Green has a habit of going for a walk _after_ he has supper.5_Although/Though_ Simon has done well in his studies,he still works really hard.6The nurse wont leave her patients _unless_ shes sure they are all taken good care of.7Its already tens of years _since_ the worlds population reached
17、 five billion.8Life is very much easier_than_ it was twenty years ago.9The movie was so moving_that_ I couldnt help crying when I saw it.10You shouldnt get upset just _because_ you didnt get the first place.用括号内所给单词的适当形式填空。1Well stay at home if it _rains_ (rain)tomorrow.2The bell _rang_ (ring)while
18、the teacher was explaining the experiment to the students.3The little girl didnt stop crying until she _found_ (find)her mother.4You_will_be _ (be)late unless you go there by taxi.5Mr Wang has taught us history since we _came_ (come)to this school.6She will return the magazine to the library as soon as she_finishes_ (finish)reading it.7He_fell_ (fall)asleep when he was reading.8When you call me last night,I_ was_playing_ (play)the piano.9I_have_lived_ (live )here since I was born.10Every morning when Alice_wakes_ (wake)up,she begins singing.请完成精练本第68页作业