Unit5Discoverusefulstructures主语从句课件高中英语人教版选择性

Nounclausesas

thesubject主语从句

1.什么是名词性从句？名词性从句包括哪些？2.什么是主语从句？3.引导主语从句的连接词有哪些？做形式主语的结构有哪些？

问题导学

句子类型简单句并列句复合句主句形容词性从句(定语从句)名词性从句副词性从句(状语从句)主语从句宾语从句表语从句同位语从句从句Definitionandtypes:主语从句定义主语从句连接词主语从句注意事项巩固练习Contents1234什么是主语从句在主从复合句中，充当主语的从句是主语从句。它是名词性从句的一种。引导主语从句的连接词有从属连词、连接代词和连接副词。6主语Hisjobisimportant.Whathedoes

isimportant.主语Thenewsmakesushappy.Thathebecamethechampion

makesushappy.Tast:Findoutthesubjectsofeachsentence.7Heconsideredhimselfafarmer.Yuan’sinnovationhashelpedtofeedmorepeople.UsingsaltylandinChinaforriceproductionwashislatestvision.Howthiscouldbedonewasachallengingquestionatthetime.WhatconcernedYuanLongpingmostwasthatfarmersoftenhadpoorharvests.Itwastruethathehadjustreturnedhishomeland.Findthesubjectofthefollowingsentences找主语81.That

IloveEnglishisreal.2.Thatyoucantravelaroundtheworldisamazing.3.Whetherhewillcomeisuncertain.4.Whethertheboycouldwinmademecurious.Conclusion1:that在句中

（有/无）含义，

（充当/不充当）句子成分，

（可/不可）省略。Whether

(充当/不充当）句子成分；意思是“

”。当主语从句在句首时，whether一般

（能/不能）被if替换。无不充当不可不充当是否不能That/whether/if9What/who/which/whoever1.Whattherefugeeshavegonethroughisbeyondourimagination.2.WhowouldgettheopportunitytotraveltoBeijingisunknown.3.Which

studentwouldbethevolunteerisnotclear.4.Whoeverbreaksthelawwillbepunished.Conclusion2:引导主语从句的连接代词，主要有谁“

”、无论谁“

”什么“

”无论什么“

”、谁的“

”、哪一个“

”；在句中可以充当

、

、表语、

。whowhoeverwhatwhateverwhosewhich主语宾语定语whether与if引导主语从句：如果主语从句位于句首，不能用if引导，此时，只能用whether。但如果用it作形式主语，而把主语从句放在句末时，也可以用if引导。

用whether或if填空1.

Itdoesn’tmatter___________hewillcomeornot.2.________we’llgocampingtomorrowdependsontheweather.3.Itwasdoubtful___________TomreallysawSharon.4.________TomreallysawSharonwasdoubtful.whether/ifWhetherwhether/ifWhether2.连接代词:

who；whoever；whom；whose；what；whatever；which；whichever连接代词Whatmakesmeangryisherattitude.Whatweneedismoretime.WhichbookIshallchoosehasn’tbeendecided.Whoeverbreaksthelawwillbepunished.连接代词在从句中的功能what,who,whom,wh+ever作主、宾、表语等which,whose作定语Anyonewho;ThepersonwhoWhoeverleavestheroomlastoughttoturnoffthelights.Whicheverclimbergetstothetopfirstwillgettheprize.Whatevermymothercooksistasty.whoever,whatever,whichever在意义上更为强调，常译为“无论……”；3.连接副词：when;where;how;why连接副词Whenwewillbreakuphasn'tbeendecided.Wherethemeetingwillbeheldisnotknown.Whyhecriesisnotclear.Howshekeepshealthyisasecret.when在主语从句中充当时间状语。where在主语从句中充当地点状语。why在主语从句中充当原因状语。how在主语从句中充当方式状语。引导主语从句的关联词从属连词(不作成分）

that无词义、不翻译、不可省略

whether/if意为“是否”。如果有形式主语it，whether可换成if。如果whether在句首或后面直接跟ornot时，不能换成if。连接代词（作成分）what,who,whom,which,wh-+ever,whose等在从句中充当主语、宾语、表语、定语等成分。连接副词（作状语）when,where,how,why在从句中作时间、地点、方式、原因状语等成分。Finishexercise21._________theresearchcentreistobesetuphasnotbeendecided.2.______manycountriesstillfacefoodshortagesremainsabigproblem.3.______impressedmemostwasthatthehybridriceenabledfarmerstoexpandtheirouputgreatly.4.__________theplanistobecarriedoutstillneedsdiscussing.5.______thenewchemicalpesticideiseffectiveremainstobeseen.6.______willjoinintheresearchteamwillbeannouncedtomorrow.7.______hequithishigh-payingjobisnotdifficulttounderstand.Hewantedtostartuphisownbusiness.Whether/WhereThatWhatWhether/WhenWhetherWhoWhyThatallcountriesworktogetherisimportant.

探寻规律3：

主语从句太长怎么办？用一个

It

来解决问题！

Itisimportantthatallcountriesworktogether.

It＋be＋形容词/名词短语/过去分词/不及物动词＋that从句Itiscertainthat

themedicinewillnotbringaboutsideeffect,becausethousandofpatientshavetakenit.形容词(necessary/likely/important/certain等名词(短语)(apity/ashame/nowonder等)Itisapitythatyoumissedsuchagoodchance.It’ssaidthat

hehasgonetoShanghai.过去分词(said/told/reported等)Itappearsthatheisworryingaboutsomething.不及物动词(seem,appear,happen,matter等)19It作形式主语(1)It+be+形容词（obvious,true,surprising,wonderful,possible,likely,certain)+that从句(2)It+be+过去分词(said,reported,thought,expected,decided,announced,

suggested等)+that从句(3)It+be+名词词组(apity,ashame,goodnews,anhonor,

nowonder等)+that从句(4)It+动词/动词短语(seem,appear,happen,matter,turnout,occurto等)+that从句Specialusage主语从句的几点注意事项0321主语从句的语序1.HowmuchdidIpayfortheviolinisasecret.2.HowmuchIpaidfortheviolinisasecret.3.Itisn’tclearwhetherhewillcomeornot.4.Itisn’tclearwhetherwillhecomeornot.5.Wherewewillhaveapicnicshouldbediscussed.6.Wherewillwehaveapicnicshouldbediscussed.7.Howwegoforapicnicshouldbediscussed.8.Howdowegoforapicnicshouldbediscussed.√√××√√××Rule1:主语从句的从句部分要用______语序

21陈述句22主谓一致Rule2:forms+主句谓语verb单个主从多个主从并列It作形式主语What引导主从单数复数单数表/宾语决定2.主句谓语动词的选择：填空：1).Whatyousaidatthemeeting________(describe)abrightfutureforthecompany.2).Whetheritwillrainornot_____(be)notclear.3).Thathehaswonsomanyawards________(surprise)us.4).WhenheleftusandWhyhedidthat_______(remain)unknowntous.5).Whatweneed____(be)morepersonalcomputers.6).Whatweneed____(be)moretime.describesissurprisesareisremain3.时态的选择总结：主句用一般现在时态，从句根据句意，可用_________。主句用过去时态，从句只能用______________。

若从句为客观真理，总是用____________。任何时态过去相应的时态一般现在时态3.时态的选择填空：1).What_______(cause)th