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1、SubjectClauses 主语从句GrammarWhatpartdoestheunderlinedpartserveasineachsentence?Atreehasfallenacrosstheroad.Youareastudent.Tofindyourwaycanbeaproblem.Smokingisbadforyou.“Howdoyoudo?”isagreeting.Whatshesaidisnotyetknown.Thatweshallbelateiscertain.Whetherhewillgothereisnotknown.Howwe
2、canhelpthetwinswillbediscussedatthemeeting.定义：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：从属连词:that,whether；连接代词:who(whoever),whom,whose,what(whatever)和which(whichever)；连接副词:when,where,how和why。1.连接词：1）从属连词：that，whether引导主语从句只起引导作用，在主语从句中不充当任何成分，that本身无实际意义，但不能省略.whether意为“是否”，放在句首句末皆可。Th
3、atpricewillgoupiscertain.Thathewillcomeiscertain.Whetherwegobytrainorbyboatmakesnodifference.Whether he’ll come here isn’t clear.2)连接代词who(whoever),what(whatever),which(whichever),whom,whose.Whichsidewillwinisnotclear.Whowillwritethepoemhasnotbeendecidedyet.Whateverhedidisright.
4、Whokilledthescientistremainsaquestion.Whomsheborrowedmoneyfromstillpuzzledhim.3)连接副词when，where，how，why等。How this happened is not clear to anyone.Whenhewillbebackdependsontheweather.Whenwe’llstarttomorrowwillbetoldsoon.Wherethetestwillbegivenisnotyetdecided.Makesentences:It’scert
5、ainthatwewillbelate.Thatwe’llbelateiscertain.Wedon’tknowwhetherheiscomingornot.Whetherheiscomingisnotknown.Wedon’tknowwhathewantstotellus.Whathewantstotellusisnotknown.Whenyouwillcomebackdoesn’tmatter.Itdoesn’tmatterwhenyouwillcomeback.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
6、真正的主语.例:Thatweshallbelateiscertain.--It’scertainthatweshallbelate.1.Thattheearthisroundisknowntoall.--2.Thatyoumissedthechanceisapity.--Itisapitythatyoumissedthechance.It’sknowntoallthattheearthisround.A. It+be+形容词+that从句(obvious, true, surprising, good, wonderful, funny, p
7、ossible, likely, certain, probable, etc.)如：It is certain that she will do well in her exam.B. It+be+名词词组+that从句(an honour, a fact, a pity, etc）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+that从句(said, reported, thought, expected, decided, announced, etc
8、。）如：It is said that Mr. Green has arrived in Be
