高一英语必修3名词性从句---主语从句和表语从句导学案.doc

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1、NounClauses(名词性从句)导学案Part1.主语从句（NounClausesastheSubject）一．导学【什么是名词性从句？】原来名词性从句是从另一个角度所命名的从句，即在句中起名词作用的从句就叫名词性从句名词性从句包括，，，。名词性从句的引导词：单词词义在词中所充当的成分连词thatif/whether连接代词what(ever)which(ever)who(ever)whom(ever)whose(ever)连接副词whenwherewhyhow（一）主语从句定义-----用作的从句就叫主语从句，它是名词性从句之一。Step1：感悟下列各句的主语并且划出下列句中的主

2、语：(标出词性)1.Youareastudent                 2.Atreehasfallenacrosstheroad.3.Smokingisbadforyou.            4.Tofindyourwaycanbeaproblem.5.Itisimpossibletofinishthistaskinhalfanhour.6.30yearshasseenthechangesinourhometown.Step2.认识主语从句，主语从句在从句中作主语。1).Whatisneededforthespacetripiscarefulpreparation.2)

3、.Whetherwildlifecanbewellprotectedisofgreatimportance.3).Whowillgomakesnodifference.4).Whichkindoffoodisthebestisstillnotcertain.5).Whentheywillhaveanewrestaurantopenedhasnotbeendecidedyet.6)Howgoldwasfoundthereisnotclear.7).Whythereisgravityishardtounderstand.8）Itisourdutythatwestudentscleanthe

4、classroomeveryday.思考与探究：<1>作主语的可以是<2>从句用什么语序？<3>8)句子的主语怎么不在句首？★注意:1.That-从句作主语通常用it作先行词，而将that-从句置于句末，例如：Itistruethattheearthisround.It'sapitythatyoushouldhavetoleave.　你非走不可真是件憾事。132.表示“是否”意义时，用whether而不用if引导主语从句，Whethershewillcomeornotisstillaquestion.（但如果有形式主语it引导时，既可用whether，也可用if）。3.有时可用形式主语

5、it代替主语从句：e.g.Itisstillaquestionwhethershewillcomeornot.=Ithasnotbeendecidedyetwhentheywillstart.★用it作形式主语的that-从句有以下四种不同的搭配关系：a.It+be+形容词+that-从句Itisnecessarythat…　　　有必要……Itisimportantthat…　　　重要的是……Itisobviousthat…　　　　很明显……b.It+be+-ed分词+that-从句Itisbelievedthat…　　　　　人们相信……Itisknowntoallthat…　　　众所

6、周知……Ithasbeendecidedthat…　　已决定……c.It+be+名词+that-从句Itiscommonknowledgethat….....是常识Itisasurprisethat…令人惊奇的是……Itisafactthat…　　事实是……d.It+不及物动词+that-分句Itseems/appearsthat…　　似乎……Ithappensthat…　　　　碰巧……Itoccurredtomethat…我突然想起……　Step3：寻规找矩：请划出下列各句的主语(部分)。1.Thatshewaschosenmadeusveryhappy.2.Whowillgotot

7、heconcertisnotknown.3.Whethershewillcomeornotisstillaquestion.4.Whichbooktheywillchooseisstillunknown.5.Whenweshallholdoursportsmeetisnotdecided.6.Whydinosaursdiedoutremainsapuzzle.7.Howtheywillsolvetheseriousproblemtodayhas