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1、精选优质文档-倾情为你奉上一对一个性化学科优化学案鹰击长空基础不丢一、概述在复合句中具有名词的性质的作主语、表语、同位语、宾语的从句叫名词性从句。因此，我们把主语从句、表语从句、同位语从句和宾语从句这四种从句统称为名词性从句。It is a fact that English is being accepted as an international language. (主语从句)The trouble is that she has lost his address.（表语从句）They have no idea at all where he has gone.（同位语从句）Do you
2、 remember how he came?（宾语从句）二、主语从句(subject clauses)1、概述在复合句中起主语作用的从句叫主语从句。引导主语从句的词有从属连词、关系代词、连接副词等。引导主语从句的关联词有从属连词that、whether，关系代词：who, what, which , whom, whose, whatever, whoever, whomever, whichever；关系副词：when, where, how, why, however, whenever, wherever等。That you dont like him is none of my bus
3、iness. What he said is true. Whether the football game will be played depends on the weather.2、从属连词that，whether引导的主语从句。从属连词that，whether在主语从句中的作用只是引导主语从句，它们在从句中不担任成分，不能省略。Whether she will come or not is still a question. That they will go is certain.Whether shes coming or not doesnt matter too much.3
4、、it作形式主语引导主语从句。如果主语从句太长，为避免句子结构头重脚轻，我们可用it作形式主语，而把主语从句放在主句谓语部分之后。That引导的主语从句可用it代替，that 不可省略。 用作it作形式主语的结构：（1）It is/was +形容词+that 从句 Its natural that 很自然 Its obvious that 显而易见（2）It is/was +名词+that 从句 Its a pity that 遗憾的是 Its a fact that 事实是（3）It +不及物动词+that 从句 It seems that 似乎 It turns out that结果（4）
5、It is/was +过去分词+that 从句Its reported that 据报道 Its believed that 据认为 It is a pity that she has made such a mistake.Its strange that he didnt come yesterday. 4、由关系代词引导的主语从句。关系代词who, what, which, whom, whose, whatever, whoever, whomever, whichever等，引导主语从句时，它们分别在从句中担任主语、宾语或定语，不能省略。Whoever leaves the room
6、 last ought to turn off the lights. What you have done might do harm to other people. What he said at the meeting astonished everybody present. Who made the long distance call is not important. 5、关系副词引导的主语从句。连接副词有when, where, why, how, however, whenever, wherever等引导主语从句时，它们在从句中担任状语，不能省略。此类主语从句可以转换为以
7、it作形式主语的句子。Why he didnt come here is not clear to anyone. Where she has gone is not known yet.When they will start has not been decided yet. 三、表语从句1、概述用作表语的从句叫作表语从句，它位于主句中的连系动词之后。引导表语从句的词有从属连词that、whether、as though(if)；关系代词who, what, which, whom, whose, whatever, whoever, whomever, whichever等；关系副词wh
8、en, where, why, how, however, whenever, wherever等。可以接表语从句的连系动词有be, look, remain, seem等。That引导表语从句时，在口语中可以省略。The trouble is that we are short of money. That is why stone walls are used instead of fences around New England fields.At that time, it seemed as if I couldnt think of the right word anyhow.2
9、、由从属连词that，whether引导的表语从句。that在引导表语从句时无词义，而whether有词义，意为“是否”。这时主句的主语常常是些抽象名词，如question(问题)，result(结果)，chance(可能性)，suggestion(建议)，idea(想法)，reason(理由)等。表语从句对主句主语进行说明、解释，使主语的内容具体化。The trouble is (that) she has lost his money.The question is whether we need more ice cream3、由关系代词引导的表语从句。关系代词who, what, wh
10、ich, whom, whose, whatever, whoever, whomever, whichever等引导表语从句，在句中作主语、宾语、表语，关系代词不能省略。The question is which of us should go. The problem was who could do the work.Thats what he is worrying about. 4、由关系副词引导的表语从句。Go and get your coat. Its where you left it. That is how mice ruin many stores of grain e
11、very year.5、由连词because，as if/as though等引导的表语从句。It looked as if it was going to snow.Thats because we never thought of it.四、同位语从句1、概述用作同位语的从句叫同位语从句。它一般跟在抽象名词fact，idea，news， belief，thought，truth，doubt，suggestion，instruction，reason，question等之后，对这些名词进行说明或解释。引导同位语从句的词除连词that，whether外，还有关系代词what, which, w
12、ho, 以及关系副词how，when，where，why等。It is a fact that smoking is a danger to health.I have no idea what you mean.2、由从属连词that，whether引导的同位语从句。Information has been put forward that more middle school graduates will be admitted into universities. I didnt receive the news that the meeting had been put off.我没有
13、听到会议被推迟的消息。3、由关系代词引导的同位语从句。The question who should be the first has not been settled.You can have no idea what he said.4、由关系副词引导的同位语从句。I have no idea when he will be back.They usually write exact instructions how the music is to be played.五、宾语从句(object clauses)1、概述用作宾语的从句叫做宾语从句。宾语从句的位置与陈述句基本结构中的宾语相同
14、。宾语从句可以由从属连词that whether、if，关系代词what, who, whose, which和关系副词when、where、how、why等引导。He said he wanted to go to town. I hope youll be better soon.He asked me whether she was coming. 2、作动词宾语 （1）由从属连词that引导的宾语从句。that引导宾语从句时，只起引导词作用，在句中不做成分，在口语和非正式文体中常省去。I think (that) hell be right in a few days. I wish
15、（that） she would understand me.（2）由关系代词what, who, whose, which引导的宾语从句，在句中作成分，即主语、宾语、表语和定语，关系代词在句中不能省略。 A computer can only do what you have instructed it to doDo you know whom they are waiting for? He asked whose dictionary it was. He cant tell which method they will use for the experiment.（3）关系副词when，where，how，why等引导宾语从句。关系副词 when，where，how，why 既有疑问意义，又起连接作用，而且在宾语从句中充当各种状语，分别表时间、地点、方式、原因。在句中不能省略。Please tell me when we shall discuss our plan. I dont know where w
