高考名词性从句详细讲解与练习.doc
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名词性从句
一、引导名词性从句的连接词
二. 主语从句
三、宾语从句
四、表语从句
五. 同位语从句
六、名词性that-从句
七、名词性wh-从句
八、if, whether引导的名词从句
九、否定转移
十、专项考点练习在句子中起名词作用的句子叫名词从句 (Noun Clauses)。 名词从句的功能相当于名词词组, 它在复合句中能担任主语、宾语、表语、同位语、介词宾语等,因此根据它在句中不同的语法功能,名词从句又可分别称为主语从句、宾语从句、表语从句和同位语从句。
一、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:
连词:that(无任何词意)
whether,if(均表示“是否”表明从句内容的不确定性)
as if ,as though(均表示“好像”,“似乎”)以上在从句中均不充当任何成分连接代词:what, whatever, who, whoever, whom, whose, whichwhichever, whomever
3. 连接副词:when, where, how, why
二?主语从句
作句子主语的从句叫主语从句。主语从句通常由从属连词that,whether,if和连接代词what,who,which,whatever,whoever以及连接副词how,when,where,why等词引导。that在句中无词义,只起连接作用;连接代词和连接副词在句中既保留自己的疑问含义、又起连接作用,在从句中充当从句的成分。例如:What he wants to tell us is not clear. 他要跟我们说什么,还不清楚。
Who will win the match is still unknown. 谁能赢得这场比赛还不得而知。Where the English evening will be held has not yet been announced.
英语晚会将在哪里举行,还没有宣布。It is known to us how he became a writer. 我们都知道他是如何成为一名作家的。
有时为避免句子头重脚轻,常用形式主语it代替主语从句作形式主语放于句首,而把主语从句置于句末。主语从句后的谓语动词一般用单数形式。常用句型如下:
(1)It + be + 名词 + that从句mystery)
It is still a mystery (what caused the fire).
2. 照顾好孩子是你的责任(responsibility)
It is your responsibility (to take care of the children).
3. 你对我有感觉是我莫大的荣幸(honor)
It is a great honor (that you have feelings for me).
(2)It + be + 形容词 + that从句wonderful)
It is wonderful (that you are here with me).
2. 你能在这里陪我真是难以置信啊(unbelievable)
It is unbelievable (that you are here with me).
3. 你在这里陪我是必须的 (necessary)
It is necessary (that you are here with me).
(3)It + be + 动词的过去分词 + that从句
It is known to all(that you are awesome).
2. 大家都认为你们不会在一起
It is thought(that you will not be together).
3. 据报道称世界末日不会来
It is reported(that the world will not end).
(4)It + 不及物动词 + that 从句It looks like the temperature will rise a few days later
2. 看起来天将要下雨了
It seems that it is going to rain.
注意在主语从句中用来表示惊奇、不相信、惋惜、理应如此语气时,谓语动词要用虚拟语气“(should) +do”
虚拟语气用在主语从句中有以下几种情况:?1.在句型 It is important (necessary, strange, impossible, natural) that . 中,that后面的从句中的谓语动词用:(should) + 动词原形. 如:?Its necessary that
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