时间状语从句精讲

1、 时间状语从句时间状语从句 Conclusion:when / while / as引导引导时间时间状语从句时的中文意义：状语从句时的中文意义： whenwhile as1.当当.的时候的时候2.这时这时,正在这正在这时时1.当当的时候的时候(从句的谓语从句的谓语必须是必须是延续性延续性动词动词 ）2.而而,然而然而(强强调两者对比）调两者对比）3.虽然虽然1.一边一边.一一边边.2.随着随着.3.考虑到考虑到;既然既然(considering that)Back to school连接词类别作 用例 句asas 表示“当的时候”，往往和 when/ while 通用，但它着重强调主句与从句的

2、动作或事情同时或几乎同时发生。1.She came up as I was cooking.（同时）2.The runners started as the gun went off.（几乎同时）when既可以表示在某一点的时候，又可表示在某一段时间内。when可以和延续性动词连用，也可以和短暂性动词连用；而while和as只能和延续性动词连用 ;when从句的谓语动词可以在主句谓语动作之前、之后或同时发生；while和as从句的谓语动作必须是和主句谓语动作同时发生。 1.When we were at school, we went to the library every day.（在一段

3、时间内）2.Sorry，I was out when you called me（call为短暂性动词）对不起，你打电话时我刚好外出了。 3. When I got to the airport，the guests had left（got to后发生）当我赶到飞机场时，客人们已经离开了。 whilewhile 意思是“当的时候”或“在某一段时间里”。从句动作和主句动作同时发生，且从句动作为延续性动词时，when，while，as都可使用。 主句中的动作或事情是在从句中的动作或事情的进展过程中发生，从句中的动词一般要用延续性动词。1.When While As we were dancing

4、，a stranger came in（dance为延续性动词）。2.Please dont talk so loud while others are working. 延续性动词表达的动作能够延续，如：延续性动词表达的动作能够延续，如：keep保存，维持；保存，维持；walk走路；走路；read 阅读等；非延续性动词也称瞬间动词，所表达的动作不能够延续。如：阅读等；非延续性动词也称瞬间动词，所表达的动作不能够延续。如：hear听到；听到；return 归还；归还；see看见。看见。A: when, while, as的区别：的区别：1._ he broke in, we were havi

5、ng an English class.2.I was about to go out to play basket-ball _it began to rain hard. 3. The train had gone _ I got to the station4. You shall borrow the book _I have finished reading itwhenwhenwhen when when, while, as的区别：的区别：5. _ I was walking down the street, I came across an old friend of mine

6、. 6. The little children sang happily _ they walked along .7._ summer comes, it is getting hotter and hotter.8_summer coming,it is getting hotter and hotter.When/While as As WithB: 1):由由as soon as, immediately, directly, instantly, the moment, the instant, the minute, 等引导的时间状等引导的时间状语从句。这些连词都表示语从句。这些

7、连词都表示“一一就就”。2): upon(on)+V-ing /n. at+n. A:The crying boy smiled at the sight of his mother.B:On arriving (leaving, returning)3):No soonerthan=hardlywhenhardlywhenno soonerthan我刚一到家，就下雨了。我刚一到家，就下雨了。 I had hardly got home when it began to rain. =Hardly had I got home when it began to rain.=No sooner

8、had I got home than it began to rain.1) since +过去一个时间点过去一个时间点 (如具体的年、如具体的年、月、日期、钟点）月、日期、钟点）C. sinceI have been here since 2002.3) since +从句从句Great changes have taken place since you left.2) since +一段时间一段时间+ ago I have been here since nine years ago. It is/ has been +一段时间一段时间since 从从句句(did)It has bee

9、n 10 years since I smoked.(=I gave up smoking/dropped smoking)我不抽烟已有我不抽烟已有1010年了年了. .延续性动词延续性动词: :反过来翻译反过来翻译短暂性动词短暂性动词: :直译直译主要有主要有every time(每次每次)，each time(每次每次)，(the) next time(下次下次)，any time(随时随时)，(the) last time(上次上次)，the first time(第一次第一次)： D.表示表示“上次上次”、“下次下次”、“每次每次”等的等的 时间连词时间连词I thought her

10、nice and honest_ I met her.A.first time B. for the first time C. the first time D. by the first time E.由由by the time引导的时间状语从句。引导的时间状语从句。 在一般情况下，如果从句的谓语动词用在一般情况下，如果从句的谓语动词用一一般过去时般过去时，主句的谓语动词用，主句的谓语动词用过去完成时过去完成时；如果主句的谓语动词用如果主句的谓语动词用一般现在时一般现在时，主句，主句的谓语动词用的谓语动词用将来完成时将来完成时。例如：。例如： 1)By the time you came

11、back, I _ (finish) this book. 2)By the time you come here tomorrow, I _(finish)this work. had finishedwill have finishedF. till /until(在句首、与在句首、与not无间隔无间隔连用及在强调句中只用连用及在强调句中只用until)We waited till (until)he came back She didnt stop working until eleven oclock . 如主句动词是如主句动词是延续性动作延续性动作，常用，常用肯定式，肯定式，表示表示

12、“直直到到为止为止”;如主句动词是如主句动词是瞬间动词瞬间动词，常用，常用否定式否定式，表示表示“直到直到才才”我们一直等到他回来。我们一直等到他回来。她到她到11点钟才停止工作。点钟才停止工作。not until 句型句型 与强调句型结合与强调句型结合I didnt go to sleep until he came back. 与倒装句式结合与倒装句式结合It was not until he came back that I went to sleep.Not until he came back did I go to sleep.G: .before的用法的用法1).表示表示“在在之

13、后之后才才”。 We had sailed four days before we saw land.“2).还没来得及还没来得及就就”。 He ran out of the room before I could say a word.3).“在在之前就之前就”。 Many people left for home before the film ended 4).和和hardly连用，连用，”hardlybefore”表示表示“刚一刚一就就”。该结构主句常用过去完成时，。该结构主句常用过去完成时，当当hardly位于句首时要用倒装语序，例如：位于句首时要用倒装语序，例如： A:I had

14、hardly sat down before (when)the telephone rang. B:The girl had hardly rung the bell the door was opened suddenly, and her friend rushed out to greet her (2010福建高考）福建高考） . A.before B.until C.as D.since before表示表示“要过多久才要过多久才” It will be(is) +一段时间一段时间+before从句从句(does) 要过要过才能做才能做It will not be +一段时间一段时

15、间+before从句从句 要不了要不了 就能做就能做It was +一段时间一段时间+before从句从句(did)过了过了做了做了It was not+一段时间一段时间+before从句从句(did) 没过没过做了做了1. _ he heard this, he got very angry. 2. I met Lucy_ I was walking along the river.3. _ a child, he lived in the countryside. A. when B. while C. as对比训练对比训练 1 1A AB BC C1. We were about to

16、leave_ it began to rain.2. She thought I was talking about her son, _, in fact, I was talking about my son.3. Hardly had I finished my composition _ the bell rang. A. when B. while C. as D. during对比训练对比训练 2 2 A AB BA A对比训练对比训练 3 3 1. It will be years _ we meet again.2. It is ten years _ I came to th

17、is town.3. It is ten years ago _ I came to this town.4. It was April 29,2011_Prince William and Kate Middleton walked into the palace hall of the wedding ceremony.(2011福建高考）福建高考）A. when B. that C. before D. sinceC CD DB BA A1. It cost me 20 yuan to get to the Quanzhou Museum yesterday. Well, it was

18、a waste of money to take a taxi _ you could have gone by bus as well. (11泉州市质检）泉州市质检） A. when B. while C. unless D. because2. You never really know whether you could handle failure _ you come face to face with it. (11厦门市质检）厦门市质检） A.until B. after C. when D. while3Because of the heavy traffic，it was

19、already time for lunch break she got to her office（10四川）四川）Asince Bthat Cwhen Duntil4. John thinks it wont be long he is ready。for his new job. （10陕西）陕西） A. when B. after C. before D. sinceA 5.How can you expect to learn anything you never listen？ (06山东山东31) A.in case B.even ifC.unless D.when6.She h

20、ad just finished her homework_ her mother asked her to practice playing the piano yesterday(09福建福建33) .A. when B. while C. after D. since7.You cant borrow books from the school library _ you get your student card.(09上海上海32) A. before B. if C. while D. as8.Nancy enjoyed herself so much she visited her friends in S