必修3unit4 grammar主语从句.ppt

SubjectClauses主语从句 1 主语从句 从句在句中充当主语成分 1 Thathewillsucceediscertain Whetherhewillgothereisnotknown 3 Howwecanhelpthetwinswillbediscussedatthemeeting 1 引导主语从句的连接词有三类 1 连词that whether Whetherwegobytrainorbyboatmakesnodifference Whetherhe llcomehereisn tclear Thatpricewillgoupiscertain Whatshedidisnotyetknown Whowillwritethepoemhasnotbeendecidedyet Whateverhedidisright 2 连接代词who whom whose what which whoever whatever whichever等 3 连接副词where when how why等 Howthishappenedisnotcleartoanyone Whenhewillbebackdependsontheweather Howthepyramidswerebuiltisstillamystery 主语从句后置 为了避免主语冗长 句子头重脚轻 经常用it作形式主语 主语从句放在后面作真正的主语 例 Thatweshallbelateiscertain It scertainthatweshallbelate 1 Thattheearthisroundisknowntoall 2 Thatyoumissedthechanceisapity Itisapitythatyoumissedthechance It sknowntoallthattheearthisround A It be 形容词 obvious true natural surprising good wonderful funny possible likely certain probable etc that从句 如 Itiscertainthatshewilldowellinherexam B It be 名词词组 nowonder anhonour agoodthing apity nosurprise etc that从句 如 It sapitythatwecan tgo 2 用it作形式主语的结构 C It be 过去分词 said reported thought expected decided announced arranged etc that从句 如 ItissaidthatMr GreenhasarrivedinBeijing D It seem happen等不及物动词及短语 that从句 如 IthappenedthatIwasoutthatday E It doesn tmatter makesnodifference etc 连接代词或连接副词引起的主语从句 如 Itdoesn tmatterwhethershewillcomeornot 注意 Whatyouleftareonlyseveraloldbooks Whatyousaidisofgreatimportance Whetherhe llcomehereisnotclear 1 if 不能引导主语从句 应有 whether 引导 3 主语从句的 that 一般不能省 4 what 引导主语从句时 谓语动词 1 常与其后的名词作表语一致2 根据句子的语境而定 4 主语从句需注意的问题 2 主语从句中用陈述语序 1 Whereshallwespendtheholidayisn tdecided 2 Youhavemadeamistakeisafact 3 Thatiscertainthatwecanwin 4 Nomatterwholeavestheroomlastoughttoturnoffthelights 5 Ifthepolicemenwillcomeisnotcertain weshall Thatyouhave Itis Whoever whether 改错练习 1 Ireadaboutitinsomebookorother doesitmatter itwas 01北京春季 A whereB whatC howD which 2 AfterYangLiweisucceededincirclingtheearth ourastronautsdesiretodoiswalkinspace 04上海 A whereB whatC thatD how Fashiondiffersfromcountrytocountrymayreflecttheculturaldifferencesfromoneaspect 00上海 WhatB ThatC ThisD Which D B B hemadeanimportantspeechatthemeetingwastrue A ThatB WhyC WhatD How 2 we llgocampingtomorrowdependsontheweather AIfBWhetherCThatDWhere 3 isknowntousallisthatAmericaisadevelopedcountry theFirstWorld Which belongtob As belongedtoc What belongingtod It belongingto 4 It sknowntousall aformofenergy A waterisB thatwaterisC iswaterD thatwater