If 引导的条件状语从句如何应用

状语从句： 用一个句子（从句）来作另一个句子（主句）的状语，用作状语的句子就叫作状语从句。

作什么样的状语就叫什么类型的状语从句。

例如：条件状语从句就是用一个句子来作条件状语。

状语从句的分类： （1）时间状语从句 凡是从句都必须有引导词，引导时间状语从句的词有when,before,after,until,as soon as,while 等。

（2）条件状语从句 主要看一下由if引导的条件状语从句。

if 意为“如果”，引导条件状语从句时，表示假如有从句的动作发生就（不）会有主句的动作发生。

例如： If it doesn't rain tomorrow,we will go there by bike.如果明天不下雨，我们就骑自行车去那里。

If I get there early,I can see the doctor quickly.如果我早早地到那里，我就可以快点看病。

3）地点状语从句用法要点 常用where（哪里）和wherever（无论哪里）eg. Where there is a will,there is a way. 有志者，事竟成。

We will go wherever the motherland need us most. 我们要到祖国最需要的地方去。

（4）原因状语从句用法要点 常用的引导连词有because,as和since，三者的区别是：在回答问题的时候，使用because；对于显而易见的原因，常用as或since;as和since的从句常放在主句之前，而because的从句常放在主句之后。

eg. Why did you go? I went because Tom told me to go. 你为何去？那是因为汤姆叫我去。

He was angry not because we were late but because we made a noise. 他很生气不是因为我们来迟了，而是因为我们弄出了声音。

As it was raining hard,we had to be indoors. 由于雨太大，我们只好呆在家里。

Since you feel ill,you'd better not go to work. 既然你感觉不舒服，你最好不要去上班了。

（5）目的状语从句用法要点 常用的引导连词有so that,that和in order that译为：以便，为了，目的是。

eg. Please speak more slowly so that we can make full notes. 请讲慢一点，以便我们能作详细笔记。

I shall write down your address that I may not forget. 我要把你的地址记下来，以免忘记。

I sent the letter by air mail in order that it might reach him in time. 这封信我以航空信发出，以便他能及时收到。

注：目的状语从句可以用动词不定式来替换做目的状语。

eg. We work harder than usual finish it in a week. 我们比平常加倍努力工作以在一周内完成工作。

三、主句与从句时态一致的问题。

在时间状语从句和条件状语从句中，主句和从句之间的时态一致问题一般分下列两种情况： 1. 若主句是祈使句，或主句中有情态动词，或主句中谓语动词是一般将来时，那么从句用一般现在时表示一般将来时。

例如： Be careful when you cross the road. 过马路时要小心。

Put up your hand if you have any questions to ask. 如果你们有问题要问的话，请举手。

The traffic must stop when the lights are red. 红灯亮时，车辆必须停下。

2. 若主从句谓语动词都是陈述过去，那么主从句都可以用一般过去时。

例如： She could sing when she was four years old. 她四岁的时候就会唱歌。

状语从句的具体应用

状语从句分为时间状语从句（when），地点状语从句（where），原因状语从句（because\the reason...），方式状语从句（how），结果状语从句（so），比较状语从句（than），让步状语从句（though,although,how\what\where\when\who\which+ever），条件状语从句（if \if only..）。

根据句子中的意思，及主句的内容选择出不同的关连词来充当。

【用状语从句完成句子Nobadycanlearnalanguagewell

写英语作文的时候，最好的方式是挑简单明了的句子写，用从句写的话一旦运用错误就会扣分，而用简单的句子就不会让老师跳出毛病，自然而然就会避免扣分. 这里简单跟楼主介绍一下状语从句，同位语，还有定句从句的区别，仅供参考：状语从句：一般作为先行条件，解释什么样的情况下发生什么样的事情，主要作为“条件”，一般放在句前，也有放在句子后面的，较少. 同位语：一般作为解释一个”词“，这个词通常为主语/宾语，也有定语，但是同位语的作用就是用来说明这个主语或者宾语处于什么状态，是什么样子等等. 定语从句：很显然，定语从句是用来做形容词的，它通常用来形容主语/宾语/或者一整个句子希望可以帮助楼主

状语从句的分类

1.时间状语从句 2.地点状语从句 3.原因状语从句 4.条件状语从句 5.目的状语从句 6.让步状语从句 7.比较状语从句 8.方式状语从句 9.结果状语从句1. 时间状语从句 常用引导词：when, as, while, as soon as, before, after, since , till, until 特殊引导词：the minute, the moment, the second, every time, the day,the instant, immediately , directly, no sooner … than, hardly …when, scarcely … when I didn't realize how special my mother was until I became an adult. While John was watching TV, his wife was cooking. The children ran away from the orchard（果园）， the moment they saw the guard. No sooner had I arrived home ,then it began to rain. Every time I listen to your advice, I get into trouble.2. 地点状语从句 常用引导词：where 特殊引导词：wherever, anywhere, everywhere Generally, air will be heavily polluted where there are factories. Wherever you go, you should work hard. 地点状语从句一般由连接副词where, wherever等引导，已经形成了固定的句型，例如： 句型1:Where+地点从句，（there）+主句。

【注意】此句型通常译成“哪里……哪里就……”；主句在从句后面时，there可用可不用；如果主句在从句的前面时，一般都不用there。

例如： Where there is no rain, farming is difficult or impossible.在没有雨水的地方，耕作是困难的，或根本不可能的。

They were good persons. Where they went, there they were warmly welcomed. 他们都是好人。

因此他们走到哪里都受到热烈欢迎。

You should have put the book where you found it. 你本来应该把书放回原来的地方。

Where the Communist Party of China goes, there the people are liberated.哪里有了中国共产党，哪里人民得解放。

句型2:Anywhere/ wherever+地点从句，+主句。

【注意】anywhere本身是个副词，但是，常可以引导从句，相当于连词，意思相似于wherever, anywhere引导的从句可位于主句之前，也可以位于主句之后。

而wherever本身就是个连词，表示“在何处，无论何处”。

例如： Wherever the sea is , you will find seamen.有海就有海员。

3. 原因状语从句 常用引导词：because, since, as, for 特殊引导词：seeing that, now that, in that, considering that, given that. My friends dislike me because I'm handsome and successful. Now that everybody has come, let's begin our conference. The higher income tax is harmful in that it may discourage people from trying to earn more.4. 目的状语从句 常用引导词：so that, in order that 特殊引导词：lest, in case, for fear that,in the hope that, for the purpose that, to the end that The boss asked the secretary to hurry up with the letters so that he could sign them. The teacher raised his voice on purpose that the students in the back could hear more clearly.5. 结果状语从句 常用引导词：so … that, such … that， 特殊引导词：such that, to the degree that, to the extent that, to such a degree that, He got up so early that he caught the first bus. It's such a good chance that we must not miss it. To such a degree was he excited that he couldn't sleep last night.6. 条件状语从句 常用引导词：if, unless， 特殊引导词：as/so long as, only if, providing/provided that, supposing that, in case that, on condition that We'll start our project if the president agrees. You will certainly succeed so long as you keep on trying. Provided that there is no opposition, we shall hold the meeting here.7. 让步状语从句 常用引导词：though, although, even if, even though 特殊引导词： as（用在让步状语从句中必须要倒装），while （ 一般用在句首 ），no matter …， in spite of the fact that, while, whatever, whoever, wherever, whenever, however, whichever Much as I respect him, I can't agree to his proposal. 尽管我很尊敬他， 我却不同意他的建议。

The old man always enjoys swimming even though the weather is rough. No matter how hard he tried, she could not change her mind. He won't listen whatever you may say.8. 比较状语从句 常用引导词：as（同级比较）， than（不同程度的比较） 特殊引导词：the more … the more … ； just as …， so…； A is to B what /as X is to Y; no … more than; not A so much as B She is as bad-tempered as her mother. The house is three times as big as ours. The more you exercise, the healthier you will be. Food to men is what oil is to machine. 食物之于人，犹如油之于机器。

9. 方式状语从句 常用引导词：as, as if, how 特殊引导词：the way When in Rome, do as the Roman do. She behaved as if she were the boss. Sometimes we teach our children the way our parents have taught us.10. 状语从句的简化 ♠状语从句的省略 状语从句同时具备下列两个条件：①主句和从句的主语一致，或从句主语为it；②从句主要动词是be的某种形式。

从句中的主语和be动词常可省略。

例如： When ( the museum is ) completed ,...

求状语从句的连接词

I always hesitate not that I don't want to go.下次你去医院看望你祖母时，一定要代我们向她问候。

You'll be warmly welcomed whenever you come to call on us。

另外，the first time和next time也可引导时间状语从句。

用于肯定句意为“直到…为止”，用于否定句意为“直到…才”。

可位于句首，一般不用在句首：You cannot learn anything till(until)you rid yourself of complacency。

As(Since)the sun is shining brightly today, the temperature becomes high.(as 和since表示明显的原因)温度升高了，因为今天阳光灿烂.很抱歉我做的很不够.因为我们是为人民服务的， instantly, directly, immediately）（一…就），once（一旦…），in case 万一，suppose(=supposing)假定，so (as)long as 只要，so (as)far as据…，就…。

Inasmuch as we serve the people详细一些介绍1.时间状语从句 时间状语从句由when .每当我伤风，所以不怕别人指出我们的缺点.当祖国安全受到威胁时，人民决不能袖手旁观。

As soon as(now that)you mention it,as（当…时候），whenever（无论何时），ever since（自…时候以来一直…）：She gave me a good impression the first time I saw her.我第一次见到她时，while（在…期间）， the filament will burn up. 如果灯泡里的空气不先抽尽，灯丝就会烧断， I do remember.那件事你一提，她就给我一个好印象。

2. 条件状语从句 引导状语从句的连接词有if.无论何时你来找我们：She is proud that her husband a man of many gifts。

The people can never look on while the safety of the motherland is threatened, but that I have no time.我总是犹豫不决，不是因为我不想去而是因为我没空。

在形容词后的从句也可看成是原因状语从句，连接词that有时可省去，你都会受到热烈欢迎， we are not afraid to have our shortcomings pointed out，等等。

If you keep on. 地点状语从句 地点状语从句由连接副词where, wherever（无论何处）引导：Where there is oppression, there is resistance. you'll succeed in time。

Unless air is first removed from a bulb，我就想起来了。

Once they become masters of their countries, the oppressed people can work miracles.一旦被压迫人民成了国家主人，就能创造出奇迹来，as soon as(now that ,the moment.去掉自满，你才能真正学到一点东西。

Until you let me know I had no idea of it.直到你通知我.如果你坚持下去.那里有压迫， unless(=if…not)除非….我们厂生产的拖拉机供不应求是因为他们的效率高得多。

（because表示不明显的原因）Now that (Seeing that)he is very ill, I'll do it for him.既然他病重，我会代他做那件事。

I'。

4，我才知道那件事，那里就有反抗。

Wherever you work you cannot back out.无论你在什么地方工作， providing that）假若，granted（或granting）that就算…， but that 要不是…。

Be sure to give our best regards to her next time you went to see your grander mother in the hospital，都别打退堂鼓。

3. 原因状语从句 原因状语从句有连接词as（由于）， because（因为）；m sorry (that) I haven't done as much as I should,on condition that(=provided, considering that（考虑到）， inasmuch as（因为，由于）， not that…but that（不是因为…而是因为）等引导。

Ever since he moved to the country, he has lived there.自从他迁到农村以来，就一直住在那儿。

Every(Each)time I catch cold I have a headache，头就痛.她为她的丈夫是个多才多艺的男子汉而自豪，总有一天你会成功的， since（既然）， now that（既然）， seeing that（鉴于）。

The demand of walking tractors made in our plant exceeds supply because they have a much greater efficiency,before（在…时候以前），after（在…时候以后），until(till)（直到…为止），since（自…时候以来），every (each)time（每当…）等等引导。

Suppose(Supposing)we are given the cold should, what shall we do？假如遭到冷遇，我们怎么办？So (as )long as we are vigilant in peace time we can remain invincible.只要我们居安思危，就能立于不败之地。

Send me a message in case my aunt die of an illness.万一我婶婶病故，给我捎个口信来。

Granted(Granting)that you have made some achievements, you should not be conceited.就算你取得一些成就，也不应该骄傲自满。

The girl would have fallen into the river but that I caught her.要不是抓住了那个女孩，她就掉进河里去了。

5. 方式状语从句 引导方式状语从句的连接词有as（好像），just as（正如），as if(as though)（好像），according as（按照），rather than that（而不是）等。

He gave his life for the revolution just as he made a vow when joining the Party.正如他入党时宣誓的那样，他为革命献出了生命。

I'll stay at home or be abroad according as the situation requires.我是留在国内或是出国，得看形势的需要。

I should help you rather than that you help me.应该是我帮助你而不是你帮助我。

6. 让步状语从句 引导让步状语从句的连接词有though(although)虽然，even if(even though)即使，as虽然，while虽然，whether不管… no matter how(who)what, which, when, where)...

时间状语从句讲解

状语从句讲解状语从句由从属连词（subordinating conjunctions）引导。

注意状语从句与主句之间的逻辑关系，选择正确的连词；有些连词能引导多种状语从句。

一、时间状语从句 引导时间状语从句的从属连词主要有：after, as, before, once, since, till, until, when, whenever, while, as soon as；另外有些词如：immediately（立刻）， directly（直接的）， instantly（立即地）用于as soon as 意义时，有些名词词组如 the moment（片刻）， the instant（立即的）， the minute, the day, the year, every time, next time,each time 等也用来引导时间状语从句： The mother didn't go to bed until her little daughter returned home last night. 昨晚母亲等到她的小女儿回家才睡觉。

I'll explain it to you immediately I've finished reading the letter. 我读完信立刻给你解释。

You see the lightning __________it happens, but you hear the thunder later. A) the instant（立即） B) for an instant C) on the instant（马上） D) in an instant（马上） 闪电一发生，你立刻就能看到它，但雷声，你迟一点才能听到它。

（B4,1997.1-38, A对。

） No sooner ... than 和 hardly/scarcely/barely ... when 也用来引导状语从句，意思是“一……就……”；如果将no sooner, hardly, scarcely, barely放在句首，就用倒装结构。

例： I had hardly entered the temple when it began to rained. 我刚踏进那座庙就开始下雨了。

_________when she started complaining. A)Not until he arrived B)No sooner had he arrived C)Hardly had he arrived D)Scarcely did he arrived (B6,1990.1-49,C对。

)他一到，她就开始抱怨。

No sooner had we reached the top of the hill_________we all sat down to rest. A) when B) then C) than D) until 我们一到山顶，大家都坐下来休息。

（B4,1991.6-62, C对。

） when, while, once, until,till 等后接介词短语或形容词，相当于这些词引导的状语从句：Hiram had read Lu Xun's works when (he was) in London. 海勒姆在伦敦时就读过鲁迅的作品。

When, whenever, where, wherever 常常后接 possible, necessary :She tried her best to speak English whenever possible. 只要可能，她就尽量说英语。

二、地点状语从句 引导地点状语从句的主要有：where, wherever及- where构成的复合词。

例： Although he knew little about the large amount of work done in the field, he succeeded_________other more well-in formed experimenters failed. A) which B) that C) what D) where 虽然在此领域内的许多工作他知道的很少，但是，在比他知道得更多的实验者失败的地方，他却成功了。

（B4,1998.1-40, D对。

） We received a warm welcome everywhere we arrived.我们每一个地方都受到热烈的欢迎。

三、原因状语从句 最常用的连词是：because, since, as, now (that), seeing that ,consider that 等；注意 in that是复合连词，意思是because或“在……方面”； since也用来引导原因状语从句。

例： _________ we have finished the course, we shall start doing more revision work. A) For now B) Now that C)Ever since D) By now 既然我们已经学完了这门课，我们就可开始花更多的时间去复习了。

（B4,1990.1-62, B对。

） Seeing that it is raining hard tonight, we'll have to stay here . 今晚下这么大的雨，我们只好在这里过夜了。

Liquids are like solids__________they have a definite volume. A) in that B) for that C) with that D) at that 液体就象固体一样，因为它有一定的体积。

（B4,1995.6-58, A对。

） 四、目的状语从句 主要的引导词有：so that, in order that, so,less, in case 等。

目的状语从句常常含有情态动词。

例： They are hurrying so that / in order that they may not miss the train. 他们为了赶上火车而匆匆忙忙。

He wrote down my name for fear that / less he should forget it. 他记下了我的名字，以免忘记。

五、条件状语从句 1.最常用的引导词有： if, if only(if 的强调式)，unless, as long as, so long as, in case, providing, provide (that), supposing, in the event that, on condition (that)等：I'll accept any job__________I don't have to get up early. A) lest B) as long as C) in case D) though 只要不让我早起，什么工作我都可以接受。

（94.1-60,B对。

） Government cannot operate effectively__________it is free from such interference. A) so long as B) so that C) unless D) because 政府无法有效地运作，除非它不受这种干扰。

（94.1-53, C对。

） I'm sure he is up to the job__________he would give his mind to it. A) if only B) in case C) until D) unless 只要他用心，我相信他能胜任这工作。

（98.1-45, A对。

） I'm sorry you've decided not to go with us on the river trip, but__________you change your mind, there will still be enough room on the boat for you. A) even B) nevertheless C) in the even that D) provided that (2000年全国大学生英语竞赛决赛题，C对。

) 很遗憾你已经决定不参加我们的河流旅行；但是如果你现在改变...

求状语从句的完全讲解

状语从句主要用来修饰主句或主句的谓语。

一般可分为九大类，分别表示时间、地点、原因、目的、结果、条件、让步、比较和方式。

1. 时间状语从句 常用引导词：when, as, while, as soon as, while, before, after, since , till, until 特殊引导词：the minute, the moment, the second, every time, the day,the instant, immediately , directly, no sooner … than, hardly …when, scarcely … when 2. 地点状语从句 常用引导词：where 特殊引导词：wherever, anywhere, everywhere 3. 原因状语从句 常用引导词：because, since, as, since 特殊引导词：seeing that, now that, in that, considering that, given that, considering that, inasmuch as, insomuch as 4. 目的状语从句 常用引导词：so that, in order that 特殊引导词：lest, in case, for fear that,in the hope that, for the purpose that, to the end that 5. 结果状语从句 常用引导词：so … that, so… that, such … that, 特殊引导词：such that, to the degree that, to the extent that, to such a degree that, 6. 条件状语从句 常用引导词：if, unless, 特殊引导词：as/so long as, only if, providing/provided that, suppose that, in case that, on condition that 7. 让步状语从句 常用引导词：though, although, even if, even though 特殊引导词： as（用在让步状语从句中必须要倒装），while （ 一般用在句首 ），no matter …， in spite of the fact that, while, whatever, whoever, wherever, whenever, however, whichever 8. 比较状语从句 常用引导词：as（同级比较）， than（不同程度的比较） 特殊引导词：the more … the more … ； just as …， so…； A is to B what /as X is to Y; no … more than; not A so much as B 9. 方式状语从句 常用引导词：as, as if, how 特殊引导词：the way

目的状语从句例句

目的状语从句 从句部分是用以补充说明主句中谓语动词发生的目的的状语从句。

表示目的状语的从句可以由that, so that, in order that, lest, for fear that, in case等词引导；目的状语从句的谓语常含有may, might, can, could, should, will, would等情态动词。

例句 Say it louder(so)that everyone can hear you. 大声说，以便大家都能听到你。

I am telling you that lest you should make a mistake. 我告诉你这一点，以免你搞错。

I got up early so that I could catch the first bus. 我起得很早，目的是为了赶上头班公共汽车。

She worked hard so that everything would be ready by 5 o'clock. 她努力工作，以便在五点前是一切都就绪。

She looked down so that she should not see his eyes. 她垂下目光，使她看不到他的眼睛。

We'll sit nearer the front so we can hear better. 我们坐的靠前一点，因此，我们听得清楚一点。

He works hard in order that his family may be happy.为了让家人幸福，他努力工作。

He shouted at the top of his voice,to the that(=in order that)he might be heard. 他高声呼喊，为的是让人们能听见他的说话。

I am punishing the child lest he should make the same mistake. 我惩罚那个孩子，以免他再犯同样的错误。

She took her umbrella lest it(should)rain. 他带了把雨伞，唯恐天要下雨。

Lest the wall(should)collapse,they evacuated the buliding. 他们撤离了大楼，以防墙壁倒塌。

Speak clearly so that they may understand you. 讲清楚些，以便他们能理解你。

He studied hard in order that he could pass the exam. 他努力学习以便能考试及格。

Shut the window for fear that it may rain. 把窗子关上以防下雨。

引导目的状语从句的从属连词 主要的有 in order that, so that, in case, for fear等： Speak clearly so that they may understand you. 讲清楚些，以便他们能理解你。

He studied hard in order that he could pass the exam. 他努力学习以便能考试及格Shut the window for fear that it may rain. 把窗子关上以防下雨。

【注】so that 引导目的状语从句时有时可省略so而只用that，有时也可只用so: Bring it closer that I might see it better. 拿近些，使我能看得清楚些。

I'll show you so you can see how it's done. 我将做给你看，以便你知道应怎样干。

目的状语从句与状语短语的转换 为了简洁起见，当目的状语从句的主语与主句的主语相同时，目的状语从句有时可用表目的的不定式短语替换： He got up early so that he could catch the early bus. / He got up early so as to catch the early bus.他起床很早以便赶上早班车。

He came in quietly in order that he shouldn't wake his wife. / He came in quietly in order not to wake his wife.他轻轻进来，以免把他妻子吵醒。

有时还可与表示目的的介词短语替换： He left an hour early for fear he might miss the train. / He left an hour early for fear of missing the train. 他提前一小时离开，以免错过火车。

一点注意 in case既可引导目的状语从句，也可引导条件状语从句，主要视句意而定： In case he comes, let me know. 如果他来，告诉我一声。

Tell me in case you get into difficulty. 遇到困难请告诉我。

【注】in case引导目的状语从句，从句有时可用“should+动词原形”这样的形式： Take your coat in case it rains (should rain). 带着雨衣以防下雨。

参考资料 英语语法网：http://www.yygrammar.com/Article/200802/126.html

as引导的让步状语从句有几种模式

as可引导让步状语从句，表示“虽然、尽管”，但要用部分倒装结构，形式如下：1. 形容词 + as + 主语 + 系动词。

如：Tired as he is, he offers to help me. 尽管他已经很累了，他还是主动提出帮助我。

2. 过去分词 + as + 主语 + 系动词。

如：Well-written as the book is, the author is not satisfied and prepared to revise it. 尽管这本书写得很好，作者还是不满意并打算修改它。

3. 名词 + as + 主语 + 系动词。

如：Student as he is, he does not study hard. 他虽然是个学生，却不努力学习。

4. 副词 + as + 主语 + 谓语部分。

如：Much as I admire his courage, I don't think he acted wisely.我虽然崇拜他的勇气，但我认为他这样做是不明智的。

5. 动词原形 + as + 主语 + 谓语的另一部分（情态动词或助动词may, might, will, would等）。

如：Try as you will, you won't be able to persuade him. 不管你怎么努力，你都说服不了他。

【考例1】 _____， I have never seen anyone who's as capable as John. （上海2001）A. As long as I have traveledB. Now that I have traveled so muchC. Much as I have traveledD. As I have traveled so much【考例2】 _____， Carolina couldn't get the door open.（广东2005）A. Try as she might B. As she might tryC. She might as try D. Might she as tryKey: 1. C 2. A...