高考英语 语法专题五名词性从句备考课件.ppt

语法专题(五)名词性从句一、引导名词性从句的连接词1．连接代词和连接副词在句中不是疑问词从句中要用陈述语序。2．连接代词和连接副词在句中充当句子成分；连接词whetherifasif在从句中不充当句子成分只起连接作用；连接词that在从句中不充当句子成分且无含义有时可省略。这样考过①(绵阳诊断)Itdoesn'tmattertome________Imissmytrainbecausethere'sanotheronelater.A．thatB．ifC．unlessD．when解析：if“如果”表条件。句意为：如果我赶不上这班火车也没有关系因为接下来还有一班。unless“除非”；when“当……时候”。答案：B②(北京东城区)________ObamawaselectedpresidentoftheUSAisabigsuccessfortheblacksinAmerica.A．/B．ThatC．WhatD．As解析：that引导主语从句。答案：B3．whether和if的区别：(1)whether和if在引导宾语从句时一般可以通用。这样考过③(北京)Atfirsthehatedthenewjobbutdecidedtogivehimselfafewmonthstosee________itgotanybetter.A．whenB．HowC．whyD．if解析：句意：一开始他不喜欢这份新工作但还是决定给自己几个月的时间来看一看是否情况会有好转。此题考查宾语从句。D项表示“是否”符合题意。答案：D(2)后面直接跟or或ornot时只能用whether。这样考过④(2010·厦门双十中学)—DadI'vefinishedmyassignment.—Goodand________youplayorwatchTVyoumustn'tdisturbme.A．nomatterB．wheneverC．whateverD．whether答案：D(3)在介词之后引导宾语从句时只用whether。这样考过⑤(2006·江苏)Wehaven'tsettledthequestionof________itisnecessaryforhimtostudyabroad.A．ifB．whereC．whetherD．that解析：所填连词和后面句子一起作介词of的宾语后面句中有地点状语故B不正确作介词的宾语应用whether。答案：C(4)用if会引起歧义时用whether：Pleaseletmeknowifyouwanttogo.请通知我你是否想来。/如果你想来请通知我。Pleaseletmeknowwhetheryouwanttogo.请通知我你是否想来。可能这样考⑥Imagineyouareinthesituationanddiscuss________youshoulddosomethingatonce.A．thatB．whatC．ifD．whether解析：注意区别if和whether的用法；discuss后的宾语从句不能用if引导。答案：D(5)其他几种只用whether的情况：引导表语从句、同位语从句和让步状语从句时；引导主语从句置于句首时；后接动词不定式时。可能这样考⑦________itisnecessarytostudytheproposalsforseveralmoremonthsbeforemakingadecisionistobedebated.A．WhetherB．IfC．WhatD．That解析：此处为whether引导的主语从句。答案：A4．whatwhichwhowhenwherehow等与whateverwhicheverwhoeverwheneverwhereverhowever等引导名词性从句的区别：后者引导的名词性从句不含有疑问意义而前者引导的名词性从句都含有疑问意义。这样考过⑧(北京西城区)—HiPeter.Youseemtohavegainedalotofweight.—Wellgoodfoodnotenoughexercise.That's________Igotfat.A．howB．whenC．whatD．whether解析：上文提到Peter你似乎体重增加了