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1、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.Whether he’ll come here
2、isn’t clear.Thatpricewillgoupiscertain.What she did is not yet known.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。How this happened is not
3、clear to anyone.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.Thatyoumissed
4、thechanceisapity.--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：It is certain that she will do well in her
5、exam.B.It+be+名词词组(no wonder, anhonour, a good thing, a pity, no surprise,etc.)+that从句。如：It’s a pity that we can’t go.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：It is said that Mr. Green has
6、 arrived in Beijing.D.It+seem, happen等不及物动词及短语+that从句。如：It happened that I was out that day.E.It+doesn’tmatter (makes no difference, etc.)+连接代词或连接副词引起的主语从句。如：It doesn’t matter whether she will come or not.注意：Whatyouleftareonlyseveraloldbooks.Whatyousa
7、idisofgreatimportance.Whether he’ll come hereisnot clear.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.Th
8、atiscertainthatwecanwin.4.Nomatterwholeavestheroomlastoughttoturnoffthelights.5.Ifthepolicemenwillcomeisnotcertain.weshallThatyouhaveItisWhoeverwhether改错练习1.Ireadaboutitinsomebookorother,doesitmatter_______itwas?（01北京春季)A．whereB．whatC．howD．whi
