高二英语课件：高二英语名词性从句2[1].ppt

名词性从句名词性从句在句子中起名词作用的句子叫名在句子中起名词作用的句子叫名词性从句词性从句.分为分为:主语从句、宾语从句、表语主语从句、宾语从句、表语从句和同位语从句。从句和同位语从句。 名词从句的功能名词从句的功能 o功能相当于功能相当于名词词组名词词组, 它在复合它在复合句中能担任句中能担任主语、宾语、表语、主语、宾语、表语、同位语、介词宾语同位语、介词宾语等，因此根等，因此根据它在句中不同的语法功能，据它在句中不同的语法功能，名词从句又可分为名词从句又可分为四类四类引导名词性从句的连接词引导名词性从句的连接词 可分为三类：可分为三类：1.连接代词连接代词that,whether,if 不充当从不充当从句的任何成分）句的任何成分） 引导名词性从句的连接词引导名词性从句的连接词2.连接代词：连接代词：what, whatever, who, whoever, whom,whose, which.不仅不仅起到连接一个句子的作用，同时起到连接一个句子的作用，同时也是从句的一个组成部分。也是从句的一个组成部分。 3.连接副词：连接副词：when, where, how, why 引导主语从句不可省略的连词：引导主语从句不可省略的连词：1.介词后的连词介词后的连词 2.引导主语从句和同位语从引导主语从句和同位语从句的连词不可省略。句的连词不可省略。 同位语从句同位语从句在一个更长的句子中作同位语使用在一个更长的句子中作同位语使用的句子叫同位语从句。的句子叫同位语从句。同位语与其前的词或短语表达的是同位语与其前的词或短语表达的是同一事物。如：同一事物。如：The fact that she is ill should be considered.同位语从句一般在下列词的后面同位语从句一般在下列词的后面 belief, fact, fear, hope, idea, news, problem, reason, result, possibility等。如：I have no idea when he will return. 不同连词引导的同位语从句不同连词引导的同位语从句引导同位语从句的连词除引导同位语从句的连词除that外，还可以用外，还可以用how, when, where, why, 等。He cant answer thequestion how he got themoney.不同连词引导的同位语从句不同连词引导的同位语从句I should like to know the reason why you changed the plan.I have no idea when she will be back.主语从句在另外一个句子中做主语的句在另外一个句子中做主语的句子叫主语从句。子叫主语从句。How the book will sell depends on its author. That he is the best student in the class is obvious 主语从句常用it作形式主语放句首因而我们常见到这种句式因而我们常见到这种句式：It+be+n./adj/-ed从句从句（that, whether,etc.)例：例：Its a pity that you should have to leave. It is great that I have a teacher like you.whether与if均为“是否”但下列情况下只用whether ： 1. whether引导主语从句引导主语从句并在句首并在句首 Whether he will come is not clear. 2. 引导引导表语从句表语从句 The question is whether hell come.3. whether从句作介词宾语从句作介词宾语 Im not sure about whether well win.4. 从句后有从句后有or not Whether you like it or not, you ll have to do it.表语从句表语从句在另外一个句子中作表语的在另外一个句子中作表语的句子叫表语从名。句子叫表语从名。The fact is that he has not been seen recently. 宾语从句宾语从句在另一个句子中做宾语的句子在另一个句子中做宾语的句子叫宾语从句。叫宾语从句。I worry about whether he can pass through the crisis of his illness. 宾语从句宾语从句Now I want to know what I can do.John said that he was leaving for London on Wednesday 名词性从句名词性从句主语从句主语从句同位语从句同位语从句表语从句表语从句宾语从句宾语从句名词性从句动画讲解名词性从句动画讲解名词性从句中的一些特殊用法o What=all that不可混用:o This is all what we should do.o This is what we should do.o This is all (that) we should do.o (what东西)引导的主语从句一般不用作形式主语结构.o It is a book what he wants.o What he wants is a book.常见的用作形式主语的复合句结构o 1)It is +名词+that从句o It is a fact(a shame, a pity, no wonder, good news,)thato 2)It is+形容词+that从句o It is necessary(strange,important,wonderful,o Possible,likely,)thato 这类主语从句中,谓语动词多数为should+动词原形o 3)It is+过去分词+that从句What we need is waterWhat we need are useful books.o It is said(reported, decided)thato 4)It +不及物动词+that从句o It seems(happened, doesnt matter,o Has turned out,)that o 5)It is (was) +that(who)o I met John in the street yesterday.o It is I who (that) am your true friend宾语从句的特殊用法.o 1)think,believe,suppose,expect,Imagine,guessI dont think you are right.2)think,believe,imagine,suppose,guess,Hope,Im afraid (so/not)Do you believe it will clear up?I believe so. / I dont believe so.I believe not.作介词的宾语 o that引导的宾语从句只有在Except, in, but, besides等少数介词后偶而用到:Your article is all right except that it is too long.o 有时在介词和其宾语从句的中间加形式宾it. Ill see to it that everything is ready.o 介词的宾语从句不能由if引导,而要用whether