时间状语从句讲解及练习题

1、时间状语从句讲解及练习题时间状语从旬when, while 和as引导时间状语从句的用法一、when的用法如果只从现象来看，when从句用的最多的是一般过去时，而主句的时态没有限制，根据具体情况而定.1。When he was a child he was always trying out new ideas.他小时候就常常试验一些新的设想。2。When she came into my room, I was just reading a book。她走进我房间时，我正在看书。3。Were you writing when the teacher came in? 老师进来的时候，你在写信

2、吗？4。Sorry, I was out when you called me, 对不起，你打 来的时候我出去了。5。He was on the point of leaving when someone knocked at the door.他正要走，这时有人敲门。when从句的A事件，相当于另一个事件B发生的时间点。也就是说,when从句的重点不在动作本身发生的状态，而只是把它作为一个时间点，所以when多数情况下用的是一般过去时，则不用正在进行时。因为如果用正在进行时，它表示的就是一段时间而不是一个时间点了。根据这一点，有的文章补充说：when从句的动词大多是瞬时动词。实际上，when

3、从句也可以有其它的时态，但几乎也不用进行时，因为它也只是作为一个时间参照点.例如：1。When I got to the airport , the guests had left. 当我赶到飞机场时，客人们已经离开了。By thetime2。When he had finished his homework, he took a short rest 。当他完成作业后，他休息了一会儿。3。I ll talk with the manager about this when he comes here for a visit next week,。下周，经理来这参观时，我会和他谈谈此事.二、w

4、hile的用法相比于when来说，while从句的侧重点在于描述动作正在发生的状态，它的意思是：当while事件正在发生的时候，另一件事如何如何。所以，while从句一般用的是正在进行时.而另一件事的状态没有硬性的要求，根据具体情况而定。例如：时间状语从句讲解及练习题I was watching TV while my wife was reading the newspaper 。当妻子正在看报纸的时候，我正在看电视。While Jim was mending his bike, Lin Tao came to see him.正当吉姆修自行车时，林涛来看他。While they were

5、talking, the bell rang o 正在他们谈话的时候，上课铃响了。You cant do your homework while you re watching TV。你不能一边看电视一边做家庭作业。While John was listening to the music, I was making a plan to get us home。当约翰在听音乐时，我正在制定一个回家的计划。从时间的角度来看，while表示的是一段时间，是一个过程。这是while的侧重点.因此，如果含有“一段时间的含义的时候，就可以用while。Strike while the iron is h

6、ot。趁热打铁。这句话中，是说趁着铁是热的这段时间，赶紧打铁.如果换成when意思就变了，相当于说铁只热了一下，打一下，然后铁就冷了.这显然不符合文意。再例：Im going to the post officeo-While you re there, can you get me some stamps ?三、as的用法as从句表示的也是一件事情正在发生，另一件事也正在进行当中。但与while 从句不同的是,as从句用的一般不用正在进行时，而只是一般过去时.as从句一般可以翻译成“边边。例如：1o As my mother sang those old songs, tears ran d

7、own her cheeks 。当我妈妈唱起那些老歌时，眼泪顺着她的脸颊流了下来。The students took notes as they listened.学生们边听课边做笔记.As we talked on , he got more and more excited. 我们继续往下谈的时候，他越来越兴奋.The little girls sang as they went。小姑娘们一边走，一边唱。Just as he caught the ball, there was a tearing sound 。当他抓住球的时候，有一种撕裂的声音.时间状语从句讲解及练习题as表达的事件，往

8、往只是主句动作发生的背景或条件时，as只是一个次要的时间说明，表示模糊的时间概念相对具体时间而言，不像while从句有强调while 动作本身的意思。因此，as常常翻译成“随着之意。例如：1。As the time went on , the weather got worseo 随着时间的推移，气候更加糟糕。2。The atmosphere gets thinner and thinner as the height increases 。随着高度的增加，大气越来越稀薄。3。As years go by, China is getting stronger and richero随着时间一年

9、一年过去，中国变得越来越富强了。少数情况下，如果强调动作正在发生，as从句也可以用正在进行时。这只能算是特例了。1。The sad mother sat on the roadside, shouting as she was crying。伤心的妈妈坐在路边，边哭边叫喊.2。As we were going out, it began to snow。正当我们出门时，雪开始下起来。3。He came in as I was going to bed.我正要上床睡觉，他进来了。四、when, while , as 的互换如果从句动作和主句动作同时发生，并且从句动作为延续性动词时，when,wh

10、ile, as可以互换使用。这种情况下，它们的细微区别恐怕连英、美人自己也说不清了。1。When /While /As we were dancing , a stranger came in 。当我们跳舞时，一位陌生人走了进来。dance为延续性动词2。When /While /As she was making a phone call , I was writing a letter.当她在打 时，我正在写信。make为延续性动词3。While/When/ As I was walking down the street, I noticed a police car in front

11、of thebank.我沿着马路往前走时，发现银行门前停着一辆警车。五、比较while, when, as1as, when引导短暂性动作的动词。时间状语从句讲解及练习题例如：Just as / Just when / When I stopped my car, a man came up to me。我刹车后，有一个人向我走来.2当从句的动作发生于主句动作之前，只能用when引导这个从句，不可用as或while。例如：When you have finished your work, you may have a rest.干完活后，你可以休息一下。3从句表示“随时间推移连词能用as,不用

12、when或while。例如：As the day went on, the weather got worse。日子一天天过去，天气越变越坏.六、比较until和till此两个连词意义相同。肯定形式表示的意思是“做某事直至某时,动词必须是延续性的.否定形式表达的意思是“直至某时才做某事。动词为延续性或非延续性都可以.正确使用这两个连词的关键之一就在于判断句中的动词该用肯定式还是否定式。肯定句：I slept until midnight.我一直睡到半夜时醒了。Wait till I call you.等着我叫你。在肯定句中可用 before 代替。例如：Let s get in the whe

13、at before the sun sets.否定句：She didnt arrive until 6 o clock。她直到 6 点才到。Dont get off the bus until it has stopped,公共汽车停稳后再下车。I didn t manage to do it until you had explained how。直到你教我后，我才会做。区别：1 until可用于句首，而till通常不用于句首。例如：Until you told me, I had heard nothing of what happened 。直到你告诉我以前，出了什么事我一点也不知道。2

14、Not until在句首，主句用倒装。例如：Not until the early years of the 19th century , did man know what heat is.直到19世纪初，人类才知道热为何物。Not until I began to work, did I realize how much time I had wasted.直到工作，才认识到我已蹉跎了许多岁月.3It is not untilthat 。时间状语从句讲解及练习题例如：1七 was not until I began to work that I realized how much time

15、 I had wasted.4as soon as表示“一就的结构as soon as如果表将来发生的动作，主句用将来时，as soon as引导的从句要用一般现在时。指过去发生的动作的话，主句和从句都要用过去时。一、表将来发生的动作1、I will tell him the news as soon as he comes back home .等他一回来我将告诉他这个消息.2、As soon as Tony finishes his homework , he can play with us .只要托尼完成了作业，他可以跟我们一起玩。二、过去发生的动作多指紧接着发生的两个动作1、As s

16、oon as I had made the final decision, I felt a lot more relaxed我一作出最后的决定就感到轻松多了。2、He got married as soon as he graduatedo他一毕业就结婚了3、As soon as I got home, it began to rain 。我一到家，天就开始下起雨来。练习：在以下各句的空格中填入适当的连词before, unt i I ,when, wh iIe, s i nee, after, as soon as, asI will ask where he has been as so

17、on as/when he comes tomorrow.WhiIe he was speaking, everybody listened carefully 。Asshe grew older, she became more responsible.I haven t seen him sincehe moved to the other side of the town。I waited until he came back.时间状语从句讲解及练习题6、As soonasI get to the airport, I will phone you to pick me up.7、I l

18、ike playing tennis whilemy younger sister prefers watching ball gameso8、As soon as I went in,Jason cried out with pleasure.9、It was quiet beforethose trucks started coming through the town.10、After you think it over, please let me know what is your decisiono选择：The students were singing happily I pas

19、sed the school hall.A. when B。 unless C 。 though D.whileOur teachers have been with us for nearly three years we came to junior high school.We should thank them for what they have done for us。Ao until B. before C 。 since D 。 whenI didnt believe I could do it I got to the top of Mount Tai。Ao while B 。 untilC 。 after D 。 whenJack s mother was so tired. Sh