资源描述：
《主语从句讲解_免费下载.ppt》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。
1、SubjectClauses主语从句GrammarWhatpartdoestheunderlinedpartserveasineachsentence?Atreehasfallenacrosstheroad.Youareastudent.Tofindyourwaycanbeaproblem.Smokingisbadforyou.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(
2、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。Thatpricewillgoupiscertain.Thathewillcomeiscertain.Whetherwegobytrainorbyboatmakesnodifference.Whetherhe’llcome
3、hereisn’tclear.2)连接代词who(whoever),what(whatever),which(whichever),whom,whose.Whichsidewillwinisnotclear.Whowillwritethepoemhasnotbeendecidedyet.Whateverhedidisright.Whokilledthescientistremainsaquestion.Whomsheborrowedmoneyfromstillpuzzledhim.3)连接副词when，w
4、here，how，why等。How this happened is not clear to anyone.Whenhewillbebackdependsontheweather.Whenwe’llstarttomorrowwillbetoldsoon.Wherethetestwillbegivenisnotyetdecided.Makesentences:It’scertain.we’llbelate.Ishecomingornot？Wedon’tknowWhatdoeshewanttotellus?
5、Wedon’tknowWhenwillyoucomeback?Itdoesn’tmatter.It’scertainthatwewillbelate.Thatwe’llbelateiscertain.Wedon’tknowwhetherheiscomingornot.Whetherheiscomingisnotknown.Wedon’tknowwhathewantstotellus.Whathewantstotellusisnotknown.Whenyouwillcomebackdoesn’tmatter
6、.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真正的主语.例:Thatweshallbelateiscertain.--It’scertainthatweshallbelate.1.Thattheearthisroundisknowntoall.--2.Thatyoumissedthechanceisapity.--Itisapitythatyoumissedthechance.It’sknow
7、ntoallthattheearthisround.A. It+be+形容词+that从句(obvious, true, surprising, good, wonderful, funny, possible, 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
8、’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。）如：It is said that Mr. Green has arrived in Beijing.D. It+不及物动词或短语+that从句(seem，happ
