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1、状语从句 一、时间状语从句引导时间状语从句的连词有when，while，as，before，after，whenever，till，until，since，once等。1.when除了作“当时候”解之外，还有“那时(突然)，这时(突然)”之意，常用于下列句式：was/were doing.when.“正突然”；was/were about to/going to do.when.“正要突然”；had just done.when.“刚突然就。”We were about to set off on our way when it suddenly began to rain.另外，when还可
2、作“既然”解，引出原因状语从句。It was foolish of you to take a taxi when you could easily walk there in five minutes. 2.before除译为“在之前”外，还可译为“还未就”；“不到就”；“才”；“趁着还没就”；“还没来得及就”等。Please write it down before you forget it.趁你现在没忘把它记下来。Before I could get in a word，he had measured me.我还没来得及插话他就给我量好了尺寸。3.辨析before和sincebefor
3、e可构成句型：“it will(not)be.before.”和“it was(not).before.”，意为“多久之后才”。It wont be long before we meet again. It was some time before I realized the importance of it.since可构成句型：“It is/has been.since.”，意为“做某事已有多久了；已有多久没做某事了。”It is three years since I smoked a cigar.我不吸烟有三年了。It is three years since I began to
4、 smoke.我吸烟有三年了。4.辨析while和aswhile和as都可译为“在期间；正当时”，表示主句中的动 作和从句中的动作同时发生。但while从句中的谓语动词通常是 持续性动词，而as从句中的谓语动词既可是持续性动词，也可是 短暂性动词。Please dont talk so aloud while others are working.He hurried home，looking behind as he went.【注】 as还可译为“随着”，表示事态或状况的变化或发展过程。As the years went by，his hair turned grey.另外，just as
5、是固定搭配，意为“正当时”。Just as he was leaving his house，the telephone rang.while有时可译为“而，却”，表示上下文的转折对比关系。He likes pop music，while I am fond of folk music.while还有“虽然”之意，引出让步状语从句。While I understand your viewpoint，I dont agree with you.虽然我理解你的观点，但我不同意。 5.当表达“一就”之意时，可用as soon as，immediately， directly，the moment，t
6、he minute等引出状语从句，还可用no sooner.than.，hardly/scarcely.when.等句型。The moment I heard the voice，I knew father was coming.We had no sooner arrived at the station than the train left.The boy burst into tears immediately he saw his mother.6.短语every time，each time，next time，the first time，any time，by the time
7、等也可引导时间状语从句。Every/Each time I was in trouble，he would come to help me out.每次我陷入困境时，他就会来帮助我。 二、地点状语从句引导地点状语从句的连词有where，wherever等。The church was built where there had once been a Roman temple.这座教堂建在一罗马寺庙的旧址上。The thread breaks where it is weakest.线从最弱的地方断。三、原因状语从句引导原因状语从句的连词有：because，as，since等。As I had
8、 a cold，I was absent from school.因为我得了感冒，我缺课了。此外，now(that)，seeing(that)，considering(that)，given(that)等短语也可引导原因状语从句。 Now that you are all here，lets try and reach a decision.既然你们都在这儿，咱们就设法作出一个决定。Considering hes only been learning English a year，he speaks it very well.考虑到他学英语才一年，他讲得很好了。四、条件状语从句引导条件状语从句
9、的连词有：if，unless等。If you have finished your homework，you can go out and play.Youll fail the exam unless you study hard.【注】条件状语从句中通常不用将来时态，要用一般现在时或现在完成时代替一般将来时，一般过去时或过去完成时代替过去将来时。 另外，so/as long as(只要)，in case(万一的话)，on condition that(假如；在条件下)，suppose/supposing(that)(假设)，provided/providing(that)(倘若；在条件下)
10、等也可引导条件状语从句。As long as you dont lose heart，you will succeed.In case anything important happens，please call me up.Ill come on condition that my parents are invited，too.五、让步状语从句 1.引导让步状语从句的连词主要有：although，though，as，even though，even if。They will stand by you even if you dont succeed.【注】although和though不可
11、与but连用，但可与yet，still或 nevertheless连用。Although it was raining hard，yet they went on playing football. 2.whether.or.可引导让步状语从句，意为“不管是还 是；不论是否”。Youll have to attend the ceremony whether you are free or busy. 不管你忙不忙，你都要参加这个典礼。3.whatever，whoever，whichever，however，whenever，wherever等与no matter what/who/which
12、.等亦可引导让步状语从句，意为“不管；无论。However far it is，I intend to drive there today.The quality will be the same，whichever of them you choose.六、方式状语从句引导方式状语从句的连词有：as，as if，as though等。Do as you are told to，or youll be fired.请按照要求去做，否则你会被开除。 【注】(just)as.so.是一常用句型，意为“正如那样，也一样”；有时so分句中可用倒装语序。Just as the Americans lik
13、e baseball，so the British like soccer.就像美国人喜欢棒球一样，英国人喜欢足球。七、目的状语从句引导目的状语从句的连词有：so that，in order that，for fear that，in case等。Ill speak slowly so that you can understand me.The boy hid himself behind the tree for fear that his father should see him.Take your raincoat in case it rains. 八、结果状语从句引导结果状语从句
14、的连词有：so that，so.that.，such.that.。在非正式语体中，由so.that.，such.that.引 导的句子中that可以省略。I was caught in a shower，so that all my clothes got wet.It was so dark that he couldnt see the faces of his companions.He is such a marvelous joker that you cant help laughing.过关落实 1._ he had not hurt his leg，John would hav
15、e won the race.A.If B.Since C.Though D.When解析：if引导条件状语从句。答案：A 2.Id like to study law at university _ my cousin prefers geography.A.though B.as C.while D.for解析：连词while表示转折，意思是“而，可是”。答案：C3.He was told that it would be at least three more months _ he could recover and return to work.A.when B.before C.since D.that解析：“It is/was/will be一段时间before”译为“多长时间之后才”。答案：B 4._ I really dont like art，I find his work impressive.A.As B.Since C.If D.While解析：while引导让步状语从句，译为“尽管”；as虽可引导让步 状语从句，但从句须倒装。答案：D5.You will be successful in the interview _
