1、表语从句观察例句观察下列句子并指出黑体部分的语法作用My feeling is that theyre going to be big one day.The question is whether she will offer to help me.China is no longer what it used to be.This is what makes them so special.A simple restaurant was where he usually had the same meal of sausages，eggs and coffee.From space，the
2、 earth looks blue.This is because about seventyone percent of its surface is covered by water.It seemed as if/though the world were coming to an end!The reason why Im calling you is that I want to invite you to my birthday party.以上句子均为表语从句，具体分析如下：1句是that引导的表语从句， that不充当句子成分。2由句可知，表示“是否”时，用whether引导表
3、语从句。3句是连接代词或连接副词引导的表语从句。4because(如句)，as if/though(如句)也可以引导表语从句。5由句可知，主语为名词reason时，表语从句中的引导词要用that，而不用why。归纳用法一、表语从句的概述在复合句中作表语的从句，叫作表语从句。它位于主句的系动词之后，对主语进行解释、说明，使主语的内容具体化。含有表语从句的复合句的一般结构为“主语连系动词表语从句”。可以接表语从句的连系动词有be, seem, look, sound, taste, feel, remain, appear等。另外，because, as if, as though, as, li
4、ke等也可引导表语从句。二、表语从句的引导词1从属连词：that, whether等；2连接代词：who, what, which, whom, whose, whatever, whoever, whomever, whichever等；3连接副词：when, where, how, why, whenever, wherever, however等。三、表语从句的类型1从属连词that, whether引导的表语从句that，whether只起连接作用，在从句中不作句子成分。that无实义，一般不可省略，whether意为“是否”，不能换成if(一般不用if引导表语从句)。The trou
5、ble is that he has lost his money.麻烦是他丢了钱。The question is whether we need more ice cream.问题是我们是否还需要一些冰激凌。2连接代词引导的表语从句连接代词who, what, which, whom, whose, whatever, whoever, whomever, whichever等引导表语从句，在句中作主语、宾语、表语、定语，连接代词不能省略。The problem was who could do the work.问题是谁能做这项工作。Thats what he is worrying ab
6、out.那就是他在担心的事。3连接副词引导的表语从句连接副词 when, where, how, why, whenever, wherever, however等除在句子中起连接作用外，在从句中还充当时间、地点、方式或原因状语，本身具有词义。Go and get your coat.Its where you left it.去把外套拿来，就在你原来放的地方。I had neither a raincoat nor an umbrella.Thats why I got wet through.我既没雨衣也没雨伞，这就是我淋湿的原因。That is how mice ruin many st
7、ores of grain every year.那就是老鼠怎样每年损害大量粮食的。即学即练1用适当的关联词填空Thats what accounted for all its hot springs and other steamy features.The question is whether we can reduce the cost of the product.But the truth is that the homeless are everywhere.What concerns me most is who will be our teacher next term.Wh
8、y not try your luck downtown? Thats where the best jobs are.4because/why引导的表语从句because与why引导表语从句的区别：because引导的表语从句强调原因；why引导的表语从句强调结果。Thats because he didnt understand me.那是因为他不理解我。This is why I think my happiest days will be in the future.这就是我认为自己最快乐的日子会在将来的原因。You look tired.That may be because I d
9、idnt have a good sleep last night.你看起来很累。那可能是因为我昨天晚上没睡好。名师点津如果主句主语是reason，表语从句的连接词用that，不能用why或because。常见的句型为“The reason why .is that .”The reason why he came late is that he got up late.(that不能换成because)他迟到的原因是他起床晚了。四、表语从句使用虚拟语气的情况1as if, as though 引导的表语从句可用陈述语气，也可用虚拟语气。此类表语从句常跟在特定的动词后面，如seem, appe
10、ar, look, taste, sound, feel等。as if/as though引导的表语从句用虚拟语气时，如果从句表示与现在事实相反，谓语动词用一般过去时；如果从句表示与过去事实相反，谓语动词用“had过去分词”；如果从句表示与将来事实相反，谓语动词用“would/could/might动词原形”。You look as if youve had a good time.(陈述语气)你看起来好像玩得很开心。They talked as if they had been good friends for years.(虚拟语气)他们说起话来好像是多年的好朋友似的。2如果主句的主语是a
11、dvice, demand, order, suggestion, requirement, request, command等时，表语从句用虚拟语气，动词形式为“(should)动词原形”。The suggestion given by our teacher is that we (should) practise reading English every day.我们老师给的建议是我们应该每天练习读英语。Her request is that the doctor (should) be sent for at once.她要求立即派人请医生来。即学即练2单句语法填空When a pe
12、ncil is partly in a glass of water, it looks as if it were (be) broken.My demand is that you (should) get (get) up at six every morning from now on.单句语法填空1The reason for your mistake is that you lack confidence in yourself.2Thats what we should do at once.3The doubt is who has got away with the docu
13、ment.4He looked as if/as though he was ill.5The best moment for the football star was when he scored the winning goal.6The problem is whether we can find them there.7This is where I dont agree with you.8The question is how we can get in touch with him.9The problem is who will come to replace her.10T
14、om left immediately.Thats because he only had 10 minutes to get to his next job!.短文语法填空I read a report last night.The content was 1.that a lot of people died in a traffic accident.But the reason why I was sad is not 2.that the accident caused great damage.What astonished me most is 3.that some babies lost their lives.Thats 4.what I want to remind.However, the problem is 5.whether the government has taken some measures to deal with it and 6.how we can help them.My suggestion is 7.that we should obey the traffic rules.Thats 8.because we should be responsible for ourselves, as well as others.