主语从句用法小结

1、主语从句用法小结勉县第二中学高二(7)班郭恬指导老师：李艳请观察下列句子,注意主语从句的特点。1.Thattheearthtravelsroundthesunisawell-knownfact.Whethertheartistcandoitornotisuncertain.3.Whowillacttheleadintheplayhasnotbeendecidedyet.4.Wheretheyoungmanhasgoneisnotknown.5.Whenandwherethetestwillbegivenisnotyetdecided.【归纳总结】主语从句必须有引导词；主语从句用陈述句语气。引导

2、主语从句的词有：连词:that,whether；连接代词:who,whose,whom,whoever,what,which等；连接副词where,when,whenever,wherever,how,why等。主语从句引导词的选择：.连接词:that,whetherThathewillwiniscertain.IthasbeenreportedthatsalesofbeefinChinawillincrease.Whetherweshallraiseducksorgeeseremainstobedecided.Whetherhelloinusinthediscussionisofgreati

3、mportance.连接代词:who,whom,whose,what,which,whoever,whatever,whichever等。Itisclearwhoisafraidofhavingachangeinlandownership.Whosebagitiscannotbetold.WhatIndianeedsisalawtomakelandownershipfairer.Itisnotyetdecidedwhichcashcropwillbeproducednextyear.Whateverhesaidwasright.Whoevergotheremustgetreadyby6oclo

4、ck.连接副词:when,where,why,how,howmany,howmuch,howlong,howsoon,howoften等。Whenwe11starttomorrowwillbetoldsoon.Wherewecanbuyoxenissomethingweneedtofindout.How/Whenhecamehereisnotknown.Howwecanprotectthegrainneedstobediscussed.Howmanypeoplediedfromstarvationthatyearwillneverbeknown.Howoftenhellgotoseehisgr

5、andmotherdependsonthetimehecanspare.归纳总结：主语从句引导词的选择主要是根据从句的结构和意义来选择。1.如果从句的意义和结构完整，则用that。如果从句的意义和结构不完整，则根据从句的意义和结构选择相应的引导词。比较that/whatWhathewantsisabook.Thathewantstogothereisobvious.Whathappenedisnotclear.ThisisthebestTVthatismadeinChina.定语从句ThefirstmuseumthathevisitedinChinawastheHistoryMuseum.定语

6、从句that和what的选用：that和what都可引导主语从句。但是，what除起连接作用外，还在主语从句中充当成分，可做从句的主语、宾语、或表语。而that在主语从句中不充当任何成分，只起连接作用。翻译和分析下列句子：Itiswellreportedthatastormiscoming.Itistruethattheearthmovesaroundthesun.JtisapitythatImissedthetrain.Itdoesntmatterwhetherhewillcomeornot.Itseemsthatitisgoingtorain.Ithappenedthattheydidnt

7、knowmyaddress.归纳：为了使句子保持平衡，常用it来代替主语从句，而把主语从句放到后面，尤其是连词that引导的主语从句常用于此种句式中。常用句型如下：It+be+名词+that从句It+be+形容词+that从句It+be+动词的过去分词+that从句It+be+不及物动词+that从句Itslikely/possible/important/necessary/clearthat很可能/重要的是/必要的是/很清楚Itsknown/reported/thought/saidthat据说/据报道Itseems/appears/happensthat显然、明显、碰巧.Itsbeena

8、nnounced/declaredthat已经通知/宣布Itsnowonderthat并不奇怪/无疑Itsapity/afact/acommonknowledge（众所周知）/acommonsaying（俗话说）that主语从句常见错误：下列各句均有一处错误，请改正并分析原因。Lighttravelsfasterthansoundiscommonknowledge.改：在is后加thatothat虽无词义但引导主语从句位于句首时不能省略。Ifshescomingornotdoesntmattermuch.改：将If变为Whetheroif,whether都可表示是否，但讦不能引导位于主句之前的主语从句，它可以引导位于主句之后带有形式主语it的主语从句。Thattheprofessorsaidisofgreatimportance.改:将That改为Whatothat引导主语从句时无词义，只起一个连接的作用。Whattheprofessorsaid表示教授所说的,said后面还需要一个宾语，就只能用whatoWherewillthetreesbeplantedhasnotbeendecided.改：将will置于trees之后。主语从句要用陈述句语序。Nomatterwhobreakstherulewillbepunished.改：将Nomatter