九大状语从句重难点讲解

1、状语从句分类：（九大类）时间、地点、原因、条件、让步、结果、目的、方式、比较。Part 1 时间状语从句：最常用的连接词：When，while，as , before , after , as soon as, until, not until 次常见的连接词: The momentminute, immediately, hardlywhen, no sooner than问题一：l We wew swimming in the lake_suddenly the storm started.Awhen Bwhile Cuntil Dbeforel He was about to tell

2、me the secret _someone patted him on the shoulderAas Buntil Cwhile Dwhenl -Did Jack come back early last night? -Yes,it was not yet 8:00 _he arrived home.Abefore Bwhen Cthat Duntill He was about halfway through his meal_a familiar voice came to his ears.Awhy Bwhere Cwhen Dwhile一、时间状从中连接词when的用法小结：1、

3、when引导的时间状从的谓语动词可以是可延续的，也可以是表短暂性的动词，可用于主句和从句动作同时发生 或 从句动作先于主句动作。例：When the film ended,the people went back.When I lived there,I used to go to the seashore on Sundays.2、可用作并列连词，其意义是“那时，这时”，相当于and at thisthat time.常用于以下句式：was about to do sth. whenbe (on the point of) doing sth. when(刚要这时突然)e.g.I was a

4、bout to stop pretending to being listening to the class to listen to what the teachers said when Mr. Li shouted at me so loudly that the whole class can hear.3、还可以表示原因“既然”，相当于since,considering that.如：It was foolish of you to take a taxi when you could easily walk there in 5 minutes.问题二：l The cost of

5、 living in Glasgow is among the lowest in Britain,_the quality of life is probably one of the highest.Asince Bwhen Cas Dwhilel _I accept that he is not perfect,I do actually like the person.AWhile BSince CBefore DUnless二、时间状从中连接词while 的用法小结：1、while 引导的动作必须是持续性的，强调某一段时间内，主从句动作同时发生，或主从句中的动作或事物在从句中的动作或

6、事情的进展过程中发生。如：Please dont talk so loud while others are working.2、while作为并列连词，意为“然而，却”，表示对比。I was reading while my father was watching TV.3、while可表示尽管,相当于althoughI have to give up because of you while I like it so much.问题3：l _I get older ,I get more optimistic.l He hurried home,looking behind _he wen

7、t.l _he was going out,it began to rain.ASince BWhen CAs DWhile三、只用as,不用when或while的情况1、用于表示同一个人的两种动作交替进行，指“一边一边”，如：The girl sings as she goes to school.2、表示两个同步发生的动作或行为，如：As time went by,she became more and more beautiful.3、表示两个动作紧跟着发生，如：As he was going out,is began to rain,4、接在名词后面表示某一个年龄段时。如：As a y

8、oung man, he was active in sports.四、连接词when,while,as的用法区别:1、while引导的时间状语从句的谓语动词必须是可持续的，而when引导的时间状语从句的谓语动词既可以是可持续的，也可以是表短暂性动作的动词。WhenWhile he was eating his breakfast,he heard the door bell rang.When I stopped my car,a man came up to me.(while不可用)2、从句动作发生在主句动作之前时，只能用when 引导，不可用whileas,如：When you hav

9、e finished your work,you may have a rest.3、表示“随着”,连词用as,不用whenwhile,如：As the election approached,the violenve got worse.4、如果主句表示的是短暂性的动作，从句用延续性动作的进行时态表示一段时间内正在进行的动作时，三者可互相交换使用。如：WhenWhileAs I was walking down the street,I came across an old friend of mine.五、其他引导时间状语从句的连接词：1、一些词，如the momentminuteinst

10、ant,immediately,directly,instantly,hardlywhen,no soonerthan等，也可因的一个时间状语从句，相当于as soon as的意思。如：e.g.We will come across this situation the moment (when)your most important relatives leave you.It is not wise that we stop our lesson immediately (when) the bell rings if we cant finish our task.2、一些含有time

11、的名词短语，如everyeachnext time,by the time 等，以及the dayyear,the morning等也可以引导一个时间状语从句。如：e.g.So many thousands of people died everytime there was an outbreak.The day he returned home,his father was already dead.Next time you come ,please bring your ID card.3、如果hardly 或no sooner或 scarcely置于句首，句子必须用部分倒装结构。如：

12、Hardly had I got home when it began to rain.问题4：l -Was his father very strict with him when he was at school?-Yes,he has never praised him_he became one of the top students in the class.A、after Bunless Cuntil Dwhenl A good storyteller must be able to hold listeners curiority _he reaches the end of t

13、he story.Awhen Bunless Cafter Duntill It was not _she took off her dark glasses _I realized she was a famous film star.Awhen;that Buntil;that Cuntil;when Dwhen;then六、till,until和notuntil用法：1、untiltill引导时间状语从句用于肯定句中时，主句的动词时延续性动词，表示动作或状态一直持续到untiltill所表示的时间，意为“某动作一直持续到某时间点才停止”，译为“直到为止”。You may stay her

14、e until the rain stops.2、用于否定句时，主句谓语动词时非延续性动词，从句为肯定，意为“直到才”，如：He wouldnt go to bed till/until he had finished the work.3、until 可以置于句首，till不行。如：Until you told me , I had no idea for it.4、notuntill句型中的强调和倒装说法：It iswas not until thatNot until+从句+助动词+主句。例：e.g.it was not until you told me that I had some

15、 idea for it. Not until you told me did I hace any idea for it.七、连接词before的小结：1、词义：The American Civil War lasted four years before the North won in the end.(在之后，才)He rushed out of the room before I could say a word.(还没来得及，就)It was evening before we reached the little town of Winster.(在之前就)He make a

16、mistake,but then he corrected the situation before it got worse.(没等就)2、其他句型：1、it+（will/would）be +时间段+before “过了（多长时间）才”It will be some time before we know whether the drug takes effect or not.It was quite a few years before he finally finished the novel.2、it+（will/would）be not +时间段+before “过不了多久就”It

17、 will be not long before a helicopter arrived on the scene to rescue the surviors of the air crash.It wasnt 2 years before you go to join in the final examination.3、it+be+时间点+before “发生时，是(时间)”It was not yet 8:00 before he arrived home.八、连接词since的用法：注：since的用法主要有两点：一是表示“自从以来”，二是表示“既然”。1、 若since 引导的状

18、语从句的谓语动词是终止性的过去时，则从句表示的时间是“从动作开始的那一刻起”。如：He has studied very hard since he came to our school.We have been missing them since they left here.2、 若since 引导的状语从句的谓语动词是持续性动词或表示状态的动词的过去时时，则从句表示的时间是“从持续动作或状态结束时算起”。如：I havent heard any noise since I slept. Sleep为持续性动词，sleep的动作结束时，即“醒来”时，译为“我醒后还未听到任何声响。”Joh

19、n is now with his parents in New York .It is already 3 years since he was a teacher.3、 若since 引导的状语从句的谓语动词是持续性动词的现在完成时则表示动作和状态延续到现在（说话时），其表示的时间的起点应从动作之时算起。如：I havent heard from him since he has lived there.这里的has lived表示动作的持续性，时间的起点应从“开始居住”时算起，“自从他（开始）住在那儿，我就一直没有收到他的来信”Since we have owned a car,we h

20、ave gone camping every year.4、 句型it is +一段时间+since与it has been +一段时间+since意思相同，时间的计算从since从句的动作完成或状态结束时算起。但是，在该句型中，since从句中同样存在着谓语动词的终止性和延续性的区别。例：It is 2 years since he left the country.It is 3 years since the Whites were in London.It is 5 years since the boy became a young pioneer.(_)It is 5 years

21、since the boy was a young pioneer.(_)part2 地点状从 part3原因状从 part4 比较状从 part5 目的状从 part6 结构状从 part7 条件状从问题5：The WTO can not live up to its name _it does include a country that is home to one fifth of the mankind.Aas long as Bwhile CIF Deven thoughIt is known to all that _you exercise regularly,you wont keep good health.Aunless Bwhenever Calthough Dif1、 unless=if not,意思是“除非”、“如果不就”._i can see,there is one possible way yo keep away from the danger.Aas long as BAs far as CJust as DEven if I always take something to read when I go to the doctors _I have to wait.Ain case Bso that Cin o