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1、高一英语-Unit-4-astronomy-grammar主语从句1.定义主语从句是在复合句中充当主语的从句。2.引导词连词that,whether连接代词who(ever),whom(ever),which(ever),what(ever)连接副词where,when,why,how引导词—(1)连词1)that在从句中不作成分，无词义，不可省ThatChinawillbecomestrongeriscertain.2）Whether不作成分，意为“是否”Whetherlifeexistsonotherplanetsisnotc
2、lear.引导词—(2)连接代词连接代词：who,whom,whose,what,which，whoever“无论谁”,whatever“无论什么”,whichever“无论哪个”在从句中做成分（主、宾、表、定）whowillhostthemeetinghasn’tbeendecided.Whatyousaidjustnowisnottrue.Whoeverheisdoesn’tmatter.Whosecarrunsfasterisobvious.主宾表定引导词—(3)连接副词when,where,why,how有词义，在从句中作
3、状语Howtheaccidenthappenedisnotclear.Whenthebiologistfoundthetheoryisnotclear.3.用it作形式主语的主语从句Itbe+形容词+that从句Itisobviousthatthegirlistellinglies.Itbe+名词词组+that从句Itisapitythatyoucan’tgowithus.Itbe+过去分词+that从句ItisreportedthataviolentearthquakehappenedinJapan.It+不及物动词+that从
4、句Ithappenedthathewasoutthatday.(5)It+及物动词+sb.+that从句Itshockedmethathedidn’ttellanyonethenews.注意事项陈述语序时态一致谓语动词单复数Whenweshallgohasnotbeendecided.Whentheywillstartandwheretheywillgohavenotbeendecidedyet.Whenandwherethemeetingwillbeheldhasnotbeendecidedyet.WhatIneedismone
5、y.WhatIneedarebooks.注意事项4.Whether和if的区别在用it作形式主语的主语从句中，if可以和whether替换Itisnotdecidedyetwhether(if)theywillsellthehouse.在从句句首或者后面有ornot时，只能用whetherwhethertheywillsellthehouseisnotdecidedyet.2._______theycansolvethequestionisstillunknown.A.IfB.WhichC.WhetherD.What3._____
6、hesaidatthemeetingastonishedeverybody.A.WhyB.WhatC.ThatD.Who4.____isafactthatEnglishisacceptedasaninternationallanguage.A.ThereB.ThisC.ThatD.It1._____weneedmorepracticeisquiteobvious.A.WhatB.ThatC.WhenD./1.____wantstostayinahotelhastopaytheirownway.(浙江2008)A.AnyoneB.T
7、heoneC.WhoeverD.Who2.____mattersmostinlearningEnglishisenoughpractice.(2007全国卷Ⅱ)WhatB.WhyC.WhereD.Which高考链接3.____fashiondiffersfromcountrytocountrymayreflecttheculturaldifferencesfromoneaspect.(上海2002春)A.WhatB.ThatC.ThisD.Which4.____we’llgocampingtomorrowdependsonthew
8、eather.(NMET1996)A.IfB.WhetherC.ThatD.Where【常见错误展示】下列各句均有一处错误，请改正并分析错误的原因。1.Lighttravelsfasterthansoundiscommonknowledge.2.I
