搜索
主语从句适用学科英语适用年级高三适用区域全国课时时长（分钟）60分钟知识点主语从句连接词的基本用法教学目标能够正确分析从句结构；掌握连接词的基本用法教学重点掌握that、what、whether等的用法，能够正确判断从句所缺成分教学难点It做形式主语教学过程一、课堂导入Whatpartservesassubjectineachsentence?Atreehasfallenacrosstheroad.Youareastudent.Tofindyourwaycanbeaproblem.Smokingisbadforyou.“Howdoyoudo?”isagreeting.二、复习预习给出主语从句，分析成分：Whatshesaidisnotyetknown.Thatweshallbelateiscertain.Itiscertainthatweshallbelate.三、知识讲解知识点1：主语从句的概念及其连接词：用作主语的从句叫主语从句，它是名词性从句之一。引导主语从句的连接词有：连词that,whether；连接代词who,what和which；连接副词when,where,how和why等。知识点2：连接词的用法。1.【考查点】that无意义，只起到引起从句的作用Thattheyarebadlyinneedofhelpisquiteclear.他们急需帮助，这是十分明显的。Thattheywereintruthsisterswasclearfromthefacialresemblancebetweenthem.很明显，她们确是亲姐妹，她们的脸型很相似。Thatonebelievesinoneselfindoingeverythingisveryimportant.Thathebeathisopponentinthetennisgameencouragedhisteammates.2.【考查点】what有意义，“所……的”或随句子意思而定。在从句中作主语，宾语和表语。Whattheteachersaidtodaywasquiteright.老师今天说的话是十分正确的。Whatmakesherdifferentfromothersisherstrangebehavior.Whatshedidisnotyetknown.她干了什么尚不清楚。3.【考查点】whether有意义，“是否”。Whethertheywillsellthehouseisnotyetdecided.他们是否卖掉这所房子还没有决定。Whetheritistrueisnotcertain.Whetherhe’llcomehereisn’tclear.他是否会来这里还不清楚。4.【考查点】when引起表示时间的主语从句，意思是“……的时候”或“何时……”Whenwecangetridoftherubbishisstillunknown.5.【考查点】where引起表示地点的主语从句，意思是“在……的地方”或“到……的地方”Wherethemeetingwillbeheldhasn’tbeendecided.6.【考查点】how引起表示方式的主语从句，意思是“……的方式”或“如何……”Howwecangetintouchwithhimisthemostimportant.Howthishappenedisnotcleartoanyone.这事怎么发生的，谁也不清楚。7.【考查点】why引起表示原因的主语从句，意思是“……的原因”或“为什么……”Whyhesaidthatrubbishatthemeetingpuzzledme.8.【考查点】who“谁”，whose“谁的”Whowillbechosenisthetopicofconversationnow.Whosehandwritingisthemostbeautifulisveryclearnow.9.【考查点】疑问词+ever也可以引起主语从句Whateverwassaidheremustbekeptsecret.这里说的话都应当保密。Whoevermakesmistakesmustcorrectthem.凡犯了错误的人都必须改正。Whoeverfailstoseethiswillmakeabigmistake.知识点3：常以it作形式主语的句型(1)It+be+形容词（obvious,true,natural,surprising,good,wonderful,funny,possible,likely,certain,probable,etc.）+that从句。Itiscertainthatshewilldowellinherexam.毫无疑问，她考试成绩会很好。Itisprobablethathetoldhereverything.很可能他把一切都告诉她了。ItistruethattheChinesevolleyballteamoncewonsixworldchampionships.(2)It+be+名词词组（nowonder,anhonor,agoodthing,apity,nosurprise,etc.）+that从句。Itisapitythatwecan’tgo.很遗憾我们不能去。(3)It+be+过去分词(said,reported,thought,expected,decided,announced,arranged,etc.)+that从句。ItissaidthatMr.GreenhasarrivedinBeijing.据说，格林先生已经到了北京。(4)It+seem,happen等不及物动词及短语+that从句。IthappenedthatIwasoutthatday.碰巧我那天外出了。(5)Itdoesn’tmatter(makesnodifferenceetc.)+连接代词或连接副词引起的主语从句。Itdoesn’tmatterwhethershewillcomeornot.她是否来这无关紧要。(6)当that引导的主语从句出现在疑问句中时，要用it作形式主语，而把主语从句后置。Doesitmattermuchthattheywillnotcometomorrow?他们明天不来很要紧吗？(7)当主语从句出现在感叹句中时，要用it作形式主语，而把主语从句后置。Howstrangeitisthatthechildrenaresoquite.孩子们这么安静真奇怪。知识点4：1.【考查点】在Itisinsisted/ordered/commanded/suggested/advised/proposed/demanded/required/requested…that…结构中，谓语动词常用should+动词原形。Itissuggestedthatweshouldthinktwicebeforeweact.Itisrequestedthatweshouldchangetheoldinstrument.2.【考查点】在Itisnecessary/important/strange/surprisedthat…或Itisapity/shamethat…结构中，用should+动词原形Itisapitythatheshouldgowithouttellinganyone.Itisapitythatyoushouldmissthebus.真遗憾，你错过了那班公共汽车。Itisnecessarythatyoushouldtellhimthetruth.知识点5：单个的主语从句作主语时谓语动词用单数；由and连接的两个主语从句作主语时，谓语动词用复数。WhenwewillgotoAustraliaisnotdecided.Whowillgothereandwhentheywillgotherearenotknown.Howandwhytheyhavedonethatisnotknown.四、例题精析【例题1】______makesthebooksoextraordinaryisthecreativeimaginationofthewriter.A.ThatB.WhatC.WhoD.Which【答案】B【解析】本题考查主语从句的关系词辨析。句意：让这本书如此不同寻常的是作者富于创造的想象力。【例题2】________thedelayedflightwilltakeoffdependsmuchontheweather.A.WhyB.WhenC.ThatD.What【答案】B【解析】本题考查主语从句的关系词辨析。句意：延误了的航班何时起飞主要取决于天气。【例题3】Exactly________thepotatowasintroducedintoEuropeisuncertain,butitwasprobablyaround1565.A.whetherB.whyC.whenD.how【答案】C【解析】本题考查主语从句的关系词辨析。句意：准确地说，土豆是什么时候被引进欧洲的还不确定，但可能是在1565年左右。课程小结本节课主要围绕主语从句的概念及其连接词的基本用法进行讲解。要求学生学会正确分析从句的成分，并选出正确的连接词。此外，最好能把主语从句的基本用法和作文相结合来进行训练，为作文打好基础。同学在做题时要认真分析题目，灵活地运用所学的语法知识。