2020届高考英语 语法专题复习分类汇编精品讲义名词性从句

2020;2020届高考英语语法专题复习分类汇编精品讲义名词性从句1. Before a problem can be solved, it must be obvious _ the problem itself is. (2020;2020湖南卷31)A. what B. thatC. which D. why【解析】选A。空白处后句子缺表语。因此不能选B。B中的that 只起引导作用，无实意。而该句选what既起了引导作用，又作了句子成分表语。2. It is still under discussion _ the old bus station should be replaced with a modern hotel or not. (2020;2020重庆卷22)A. whether B. whenC. which D. where【解析】选A。该句中it作形式主语，真正的主语是由whetheror not引导的从句。句意：是否这个旧车站该由现代宾馆取代还在讨论中。考点1.名词性从句的种类及连接词I want to be liked and loved for_I am inside.A. who B. whereC. what D. how【解析】选C。what 引导的宾语从句作for 的宾语， what在从句中作am的表语。名词性从句具有名词的功能，分为主语从句、宾语从句、表语从句和同位语从句四种。它由以下三种连接词引导：1. 连词： that, whether, if。2. 连接代词： who, whom, whose, which, what等。3. 连接副词： when, where, why, how等Keep in mind _ you want others to respect you, you must respect others first.A. that when B. that ifC. if when D. when if【解析】选B。that引导一个宾语从句，宾语从句中又有一个由if引导的条件状语从句。1. that引导名词性从句时既无词义也不在从句中作任何成分。2. that引导主语从句、表语从句、同位语从句时一般不可省，引导宾语从句时常可省。但是， and连接两个由that引导的宾语从句时，第一个that可省，第二个that不可省。3. that从句一般不作介词的宾语。但： in that “因为”， except / but that“除了”例外。考点3.whether, if的用法Its reported that Pakistan is considering _ to continue its information cooperation with the US because the US didnt inform them in advance before they took action to kill Bin Laden. (2020;2020成都七中高三最后一套模拟卷)A. what B. how C. whether D. if【解析】选C。在 whether后只能用不定式或后接or not，不能接if，即whether to do 或whether or not。whether, if引导名词性从句时，表示“是否”， 不在从句中作任何成分，二者常可通用，但在下面几种情况下一般只用whether:(1)引导主语从句。(2)引导表语从句。(3)引导同位语从句。(4)在动词discuss之后。(5)在介词之后。(6)后面紧跟or not。(7)动词不定式前。考点4.名词性从句的语序I really wonder _ will stop Japan from its annual whale hunt in the Antarctic. (山西太原五中2020;2020 2020;2020学年度第二学期月考4月)A. that it is what B. what it is thatC. what is it that D. that is it what【解析】选B。空白处为一宾语从句作动词wonder的宾语。而宾语从句是一个强调句，强调what。宾语从句要采用陈述语序。名词性从句用陈述语序，为：连词(+被修饰语)+主语+谓语。即主谓不倒装。考点5. what与that引导名词性从句的区别例1：It is not always easy for the public to see _ use a new invention can be of to human life. (2020;2020重庆卷34)A. Whose B. whatC. which D. that【解析】选B。空白处作动词 see 的宾语。宾语从句按顺序为a new invention can be of what use to human life，疑问词what前置。因此选B。例2：Modern science has given clear evidence _ smoking can lead to many diseases. (2020;2020天津卷13)A. what B. whichC. that D. where【解析】选C。that引导词作名词evidence的同位语从句引导词。该词只起引导作用，无实义，不可省略。1. 在名词性从句中，that只起连接主句和从句的作用，在从句中不充当任何成分，本身也没有词义，即从句中不缺少任何成分时用连词that.2. that在从句中作主语时通常用it作形式主语，而将that从句置于句末作真正的主语。但what不能用it作形式主语。3. that可引导同位语从句，但what不能。考点6.由reason作主语时，表语从句的连接词The reason why he cant go to school is _ he is ill.A. because B. whyC. that D. which【解析】选C。reason作主语时，其后的表语从句一般用连词that。reason作主语时，表语从句所用连词为that, 一般不用because或why等。考点7. that引导同位语从句和定语从句的区别例1：_ was known to all that William had broken his promise _ he would never play computer games again. (2020;2020湖南雅礼中学高三第8次月考卷)A. As; which B. As; thatC. It; that D. What; that【解析】选C。it作形式主语，第一个that后引导从句作真正主语。名词promise后接that引导的同位语从句。对前一名词内容进一步补充说明。例2：Helping others is a habit, one _ you can learn even at an early age. (2020;2020山东卷改编)A. it B. that C. what D. who【解析】选B。one是a h