名词性从句同学们，在第3、4、5单元我们分别学习了宾语从句、表语从句、主语从句和同位语从句。
它们都属于名词性从句。
现在，我们将从下面几点谈谈名词性从句：一、相关概念; 二、种类; 三、常见引导词; 四、七大常考考点: 1.that \ what \ which; 2.it形式主语、宾语的用法; 3.语序问题; 4.同位语从句和定从的区别; 5.what \ whatever… 6.if\whether;7.虚拟语气问题; 五、相关习题集中练习一. 相关概念1. 名词：表示人或事物的名称的词2. 名词的句法作用：名词在句中主要作主语,宾语,表语和同位语。
另外还可以作定语,状语。
3. 名词性从句：在英语的句子结构中，本来该由名词充当的主语、宾语、表语和同位语，由一个句子来充当,这个句子就叫:名词性从句。
二、名词性从句的种类1. When we will start is not clear. 主语从句2. Mrs. Black won’t believe that her son has become a thief. 宾语从句3. My idea is that we should do it right now. 表语从句4. I had no idea that you were her friend.同位语从句三、常见引导词：1）从属连词that只引导，本身无意义，仅起引导作用。
（引导宾语从句时可省，但是如果是并列的多个宾语从句，只能省第一个）2）连接代词who, whom, what, which, whoever, whatever, whichever等，有意义，作成分3）连接副词where, when, how, why等，有意义，在句中作状语4）从属连词if, whether（是否）(if只能引导动词、形容词之后的宾语从句)1. What he said has nothing to do with you.2. When we’ll start tomorrow will be told soon.3. That he did such a thing satisfied me.4. How we can protect cultural relics needs to be discussed.四、名词性从句七大常考考点考点1：A. 连接词：that与what的区别What we can’t get seems better than what we have.That a new teacher will come to our school is true.that只起连接作用，无意义，在从句中不充当任何成分; what既有连接作用，又要在从句中作成分（主语，宾语，表语）(… 的东西;物;话;时间;地点;人物;数目等不同概念)1.After five hours’ drive, they reached what was called the hometown of the goddess.2. The other day, my brother drove his car down the street at what was a dangerous speed.3. The village was quite different from what it used to be.4. That the earth is round is known to us all.5. Father made a promise that if I passed the examination he would buy me a computer.B. what (什么) / which (表选择, 哪一个)1. ---Do you know what Mr. Black’s address is?---He may live at No. 18 or No. 19 of Bridge Street. I’m not sure of which.2. I read about it in some books or other, does it matter which it was?高考题选萃1）____ you don’t like him is none of my business.A. WhatB. WhoC. ThatD. Whether2) ____ he said at the meeting astonished everybody present.A. WhatB. ThatC. The factD. The matter3) There’s a feeling in me ___ we’ll never know what a UFO is.A. thatB. whichC. of whichD. what考点2 ：it作形式主语,形式宾语的用法A. it 作形式主语1.他犯了那样一个错误真是遗憾。
That he made such a mistake is a pity.可换成It is a pi ty that……2.他来不来不重要。
Whether he will come or not doesn’t matter.可换成It doesn’t matter whether……常见的主语从句句型有：It is well known / reported / thought / said that…It is clear / necessary / certain / true that…It is a pity / a shame / an honor that…It doesn’t matter whether…I t seems that…It happens that…1. ____is known to all, Taiwan is only part of China.A. AsB. ThatC. WhichD. What2. It is known to all____ Taiwan is only part of China.A. asB. thatC. ifD. for3. It was on Sunday ___ I met him.A. thatB. whenC. whatD. whichB. it作形式宾语(1) make / find / feel / consider / think it + adj. / n + that… / to do…(2) it 指代后面从句所叙述的内容，常用于这些动词后，like/dislike/love/hate /appreciate/make+it 后常跟if 或when从句E.g.: I hate it when people laugh at the disabled.(3) depend on it that…1. I like ___ in the autumn when the weather is clear and bright.A. thisB. thatC. itD. one2. You may depend on ____ that you parents will help you whenever you need it.A. themB. yourselfC. itD. me考点3 语序问题1.The photographs will show you _B___．A. what does our village look likeB. what our village looks likeC. how does our village look likeD. how our village looks like2. You can hardly imagine __C__when he heard the news.A. how he was excitedB. how was he excitedC. how excited he wasD. he was how excited3. He asked __D__ for a violinA. did I pay how muchB. I paid how muchC. how much did I payD. how much I paid★在名词性从句中,除了关联词要提到句首之外,一律要用陈述句语序4. What time do you think _B_?A.will Besty come hereB. Besty will come hereC. is Besty coming hereD. can Besty get here疑问词+do you think \ suggest \ believe / suppose …+陈述语序考点4 同位语从句和定语从句的区别同位语从句一般跟在名词fact, news, promise, truth, belief, thought, idea, answer, information, knowledge, doubt, hope, law, opinion, plan, suggestio n后, 用以说明或解释前面的名词的内容，引导词一般为that，没有意义，不作任何成分，只起连接作用，但不能省略。
定语从句：对先行词起修饰限制作用，引导词不止that，引导词在句中作一定成分，有意义，且that / which在定语从句中如果做宾语，可以省略。
E.g.: The news that she passed the exam excited her parents. 同位语从句解释说明；that在从句中不充当成分, 没有意义，是连接代词，但是不能省。
The news that we know from her excited all of us. 定语从句修饰限定；that代替先行词news，是关系代词，在从句中有意义，做成分，作宾语，可以省。
1. The suggestion that he should not go there is of great value.同位语从句2. The suggestion that he made is of great value.定语从句3. The fact that he won the first place can’t be denied.同位语从句4. The fact that he told me excited me.定语从句注: 1. 同位语从句多用that引导2. 在have no idea 之后常用wh-引导同位语从句.I have no idea where he has gone.I have no idea when he did it.I have no idea what he did.考点5. “whatever / whoever / whichever / whenever / wherever / however”的用法whatever / whoever / whichever可以引导主语从句或宾语从句，他们既在从句中做成分又在主句中作成分，相当于anything that, anybody who等，此时不能与no matter what / who / which互换E.g.: Whoever walks around in such a heavy rain will catch a cold. (试体会本句，不可以变成no matter who引导的让步状语从句)whatever / whoever / whichever / whenever / wherever / however可引导让步状语从句，意为“无论什么/谁/哪个/何时/何地/怎样……都……”，相当于no matter what / who/ which / when / where / how.E.g.: Wherever I went, the dog always followed me.(本句可换成No matter where I went, the dog always followed me. 主从句依然没有问题)1._________ was said here must be kept as a secret. What2. _______we need is more time. What3. _________ breaks the law will be punished. Whoever高考题选萃____ has helped to save the drowning girl is worth praising.A. WhoB. The oneC. AnyoneD. Whoeverwh-ever 既可引导名词性从句又可引导让步状语从句，no matter wh-只引导让步状语从句2. It is generally considered unwise to give a child ____ he or she wants.A. howeverB. whateverC. whicheverD. whenever考点6.用if 或whether 填空1. I don’t know _________I’ll be free tomorrow.whether2. It seemed as if he was indifferent(漠然)__ he could not get into a lifeboat. if3. The question is ______ this book is worth writing. whether4. It depends on ______ we will have enough money. whether5. ______ they can do it matters little to us. Whethera. 引导主语从句且位于句首、引导表语从句、同位语从句、介词后面的宾语从句只能用whether，不能用if ；b. 后面紧跟or not 时, 用whetherc. 宾语从句是否定结构时只用ifd. 后接动词不定式时用whether1._____ we’ll go camping tomorrow depends on the weather.A. IfB. WhetherC. ThatD. Where考点7虚拟语气问题1.在order，suggest（建议），demand，request，advise，insist(坚持要求，坚持主张)等所接的宾语从句中用should+V 型虚拟语气。