1、第二部分 语法专项突破第三板块 理清复杂句式专题三 名词性从句栏目导航12知 识 梳 理对 点 训 练知 识 梳 理1名词性从句的句法功能相当于名词词组，在句中充当主语、宾语、表语、同位语、介词宾语等。因此名词性从句又分为主语从句、宾语从句、表语从句和同位语从句。引导词归类：类别功能引导词从属连词只起连接作用，不充当句子成分that,whether,if连接代词起连接作用，并充当主语、宾语、表语或定语who,whom,whose,which,what,whatever,whichever,whoever连接副词起连接作用，并充当从句状语when,where,how,why 一、主语从句的注意事
2、项主语从句的一般结构主语从句谓语动词其他How the book will sell depends on its author.That he is the best student in the class is obvious.it作形式主语的主语从句Itbe/becomes/became形容词/名词/过去分词主语从句It is still a question whether she will come or not.It became clear that Mary did make a mistake.It seems/appears/happens等动词that从句It seem
3、s strange that he should have done a thing like that.It happens that he can understand a little about the language.It remains to be过去分词主语从句It remains to be seen who will be the victor in the contest.it作形式主语的主语从句It doesnt matterhow/whether从句It doesnt matter whether he is wrong or not.It doesnt matter
4、 much whether we go together or separately.It is necessary/important/natural/strange等that从句It is necessary that one(should)obey the law.it作形式主语的主语从句用来表示惊奇、怀疑、惋惜、理应如此等语气时，主语从句谓语动词用(should)do形式It is suggested/requested/proposed/desired等that从句It is suggested that you(should)attend the opening ceremony.
5、二、宾语从句的注意事项 主语及物动词宾语从句I know that he is an honest boy.Can you tell me how I can get to the zoo?I wonder if/whether you have told the news to Li Lei.They asked what Jean was doing now.Do you know who has won Red Alert game？动词后的宾语从句 feel,think,find,consider,make等，常用it作形式宾语，宾语从句后置I find it important th
6、at we should keep calm in danger.You may think it strange that he would live there.I feel it a pity that I havent been to the get-together.I have made it a rule that I keep diaries.like,dislike,love,hate,enjoy,appreciate等不能直接跟宾语从句，必须用it作形式宾语，后接宾语从句I like it that everyone passed the exam.I hate it wh
7、en they talk with their mouths full of food.动词后的宾语从句think,believe,suppose,expect等词后的宾语从句若是否定的，否定词要转移到主句的谓语动词上I dont think your answers are right.I dont believe that man is killed by Jim,is he?介词后的宾语从句介词后可接宾语从句，但连接词whether不可换作ifHe often thinks of how he can make his class lively.She worries about whe
8、ther shes really good enough.非谓语动词后的宾语从句不定式、v.ing形式、过去分词后也可以接宾语从句Id just tried to do what I could for you.I suggest eating what is fresh.主句谓语动词为一般现在时，从句时态根据实际情况而定Do you know when the ancient games began？主句谓语动词是一般过去时，从句的时态一般用适当的过去时态He asked me if I was reading the textbook when he was in.宾语从句中的时态当宾语从
9、句为客观真理和规律时，则用一般现在时He said that light travels faster than sound.与or not连用时，只用whetherI want to know whether or not the train goes to King Street.“whether不定式”结构作宾语，相当于一个宾语从句；if无此用法I dont know whether to go there.whether与if引导宾语从句的区别介词后面的宾语从句中只用whetherIm not interested in whether he has a lot of money.if
10、引导的条件句中，如果再有表示“是否”的引导词引导宾语从句时，只用whetherHe asked me whether Id move to Beijing if I got the job.whether与if引导宾语从句的区别doubt在肯定句中，接whether和if引导的宾语从句；但在否定句中，只用thatWe dont doubt that he is a brave man.I doubt whether/if Jack could manage a sailing boat.三、表语从句的注意事项 表语从句常位于连系动词be,look,remain,seem等之后，其连接词还有as
11、 if/though,because等。主语系动词表语从句The trouble is that we are short of money.He looked just as he had looked ten years before.The question is whether they will be able to help us.The problem is who we can get to replace her.I think it is because you are doing too much.The question is which of us should go
12、.because引导表语从句强调原因，why引导表语从句强调结果Its because youre careless.That is why stone walls are used instead of fences around New England fields.the reason why从句bethat从句The reason why he was absent was that he was ill.what从句bethat从句What comforted the young mother was that the baby came to life.It looks/seems
13、 as if/though从句It looks as if it is going to rain.At that time,it seemed as if I couldnt think of the right word anyhow.主句主语是advice,demand,suggestion,order,requirement，idea,request,command等时，表语从句用虚拟语气，即谓语动词用(should)do形式My advice is that you(should)quit smoking.My suggestion is that we(should)start e
14、arly tomorrow.Our only request is that this(should)be settledas soon as possible.四、其他注意事项 what充当成分，意为“的事物”，不可省略；that不作任何成分，只起连接作用，也无实际意义，有时可以省略I only knew(that)he was studying in a western country,but I didnt know whatcountry he was in.What you need is more practice.That you will win the medal seems unlikely.that与what在名词性从句中的区别 名词性从句已有疑问引导词时，不再用thatI dont understand what you said just now.(understand后不再用that)点此进入该word板块对 点 训 练2谢 谢 观 看 THANKS