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1、Section Grammar 复习状语从句语法图解探究发现When he retired at the age of 26, he had won 106 gold medals in major competitions across the world.But even though he had won everything it was possible to win in his sport, Li Ning retired with the feeling that he had failed.Please take your raincoat along with you in
2、 case it rains.If you go into a school or university anywhere, the chances are you will see students in Li Ning tracksuits with the familiar logo.Whenever Chinese athletes step out onto the track during the 2008 Olympics, they will be wearing Li Ning tracksuits.As the leader comes into the stadium t
3、o run the last few metres of the 42kilometre race, the crowd rises to its feet to shout and cheer.While I dont like his design at all, I attended the meeting.Although he is very old, he knows little about how to deal with this kind of people.我的发现(1)判断上述状语从句的类型：是让步状语从句；是条件状语从句；是时间状语从句。(2)even though引
4、导让步状语从句时，可用even_if来替换。一、时间状语从句1when引导的时间状语从句when引导的时间状语从句的谓语动词可以是延续性动词，也可以是非延续性动词；从句的动作和主句的动作可以同时发生，也可以先后发生。When I lived in the countryside, I used to carry some water for him.当我住在农村时，我常常为他送水。(延续性动词)When I came home, my mother was cooking dinner.我回家时，妈妈在做晚饭。(非延续性动词)名师点津whenever意为“每当，每每”时，也能引导时间状语从句。
5、Larry always blames me whenever anything goes wrong.每每什么事情出现问题，拉里总是责怪我。2while引导的时间状语从句while引导的时间状语从句的谓语动词是延续性动词或表示状态的动词，并强调主句和从句的动作同时发生。Study while you study; play while you play.该学习的时候就学习，该玩的时候就玩。He listens to the radio while driving to work.他去上班时一边开着车一边听广播。3as引导时间状语从句时，表示“当时，一边一边”，侧重表示主句中的动作和从句中的动
6、作同时发生，或者一种动作随着另一种动作的变化而变化。He jumps as he goes along.他边走边跳。As he grew old, he went deaf.随着年龄的增长，他变聋了。4since引导的时间状语从句since引导时间状语从句时，表示“自从”，从句中的谓语动词一般是非延续性动词。一般情况下，从句的谓语动词若是一般过去时，主句的时态常是现在完成时或现在完成进行时。He hasnt been home since he graduated.自从他毕业后就没回过家。She has been working in this factory since she left s
7、chool.她离开学校以后就一直在这个工厂工作。5till和until引导的时间状语从句till和until这两个词作连词和介词时的意义和用法相同，一般可以互换。放在句首时通常用until的形式，till在口语中更为常见。till和until引导时间状语从句时，若主句是肯定形式，这时主句的谓语是延续性动词，表示“到为止”；若主句是否定形式，主句的谓语是非延续性动词，表示“直到才”。Walk till/until you come to a white house.一直走到一座白房子为止。We didnt discuss the problem until he came back.我们一直等到
8、他回来后才讨论这个问题。6before引导的时间状语从句before引导时间状语从句时，意为“在之前；之后才；没来得及就”，常表示主句动作先于从句动作发生。从句一般不能用否定句。He had put the broken vase away before his mother came back.他趁妈妈还没回来把打碎的花瓶收拾好了。7after引导的时间状语从句after表示主句动作发生在从句动作之后。主句用一般过去时，从句可以用一般过去时，也可以用过去完成时。He called me after he had finished his work.他工作完了之后给我打了个电话。8名词短语作连
9、词引导的时间状语从句表示时间的名词短语也可以引导时间状语从句。常见的这类名词短语有：the time, the moment, the minute, the day, the year, the first time, the second time, each time, every time, next time, any time等。The moment he reached the country, he started his search.他一到达这个国家，就开始他的搜寻工作。The first time I spoke in public, I felt embarrassed
10、.第一次当众演讲，我感到局促不安。9表示“一就”的连词或结构引导的时间状语从句as soon as, immediately, directly, instantly, no sooner .than ., hardly/scarcely . when .都意为“一就”，表示从句的动作一发生，主句的动作随即发生。Immediately/directly/instantly/As soon as I saw her, I knew there was something wrong.我一看到她，就知道出事了。No sooner had she gone to sleep than the tel
11、ephone rang once more.她刚睡着，电话就又响了。名师点津注意no sooner .than ., hardly/scarcely .when .结构的时态搭配， no sooner与hardly/scarcely引导的主句谓语动词应用过去完成时，而than与when的从句中的谓语动词应用一般过去时。此外，当把no sooner和hardly/scarcely提到句首时，句子应用部分倒装语序。10时间状语从句的几个常用句型(1)It is/has been时间段since .(从句用一般过去时)“自以来已有多长时间了”，从句谓语用短暂性动词时，表示动作持续了多久，用延续性动词
12、时，表示动作停止了多久。Its six months since we last met each other.自从我们上次见面(到现在)已有六个月了。(2)It is/was时间点when .“当的时候已是”。It was midnight when they finished the work.他们完成工作的时候已是午夜了。(3)句型“It be时间段before .”中it指时间，主句常用一般将来时或过去时。主句中的表语多为long, not long, three days, two weeks等表示时间段的词或短语。It was not long before I left for
13、London.不久我就动身去伦敦了。即时演练1(1)句型转换(每空一词)His mother went to bed after he came back.His mother didnt go to bed until/till he came back.The moment I saw him, I gave him all the books.I gave him all the books as soon as I saw him.I didnt recognize her before she took off her cap.I recognized her after she t
14、ook off her cap.He came to our school three months ago.It is three months since he came to our school.(2)单句改错I was about to say while you interrupted me.whilewhenIt will not be long before you will get used to the life here.去掉第二个willImmediate he came back, his mother told him the news.ImmediateImmed
15、iately二、条件状语从句1if和unless引导的条件状语从句if表示正面的条件，意为“如果”；unless(if not)表示负面的条件，意为“除非，如果不”。If you fail in the exam, you will let him down.如果你考试不及格， 你会让他失望的。You will fail to arrive there in time unless you start earlier.You will fail to arrive there in time if you do not start earlier.如果你不早点动身，你就不能及时赶到那儿。名师点津if从句还表示不可能实现的条件或根本不可能存在的条件，也就是一种虚拟的条件或假设，从句多用一般过去时或过去完成时。If I were you, I would invite him to the party.如果我是你，我会邀请他参加聚会。 I would have arrived much earlier
