【课件】Unit 5 Working the Land Discovering Useful Structures 主语从句课件人教选择性必修第一册.pptx

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1、Unit 5 WORKING THE LAND Period 2Discovering Useful Structures Noun clauses as the subjectStep 1.Lead-in5.To find your way can be a problem.4.Smoking is bad for you.1.Jane works hard.6.That we shall be late is certain.2.You are a student.主语：主语：句子说明的人或事物句子说明的人或事物,一般位于一般位于_ _。句首句首3.The old should be re

2、spected.（名词（名词）（代词）（代词）(名词化的形容词名词化的形容词)（不定式）（不定式）（句子）（句子）1.观察下列句子并指出句子中的主语观察下列句子并指出句子中的主语（动名词）（动名词）7.What she said is not yet known.一、主语从句的定义一、主语从句的定义什么是主语从句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。它是名词性从句之一，使用陈述句语序。引导的连接词有从属连词、连接代词和连接副词。观察下列例句，指出其中所包含的主语从句及引导词:1.Whatisneededforalongtripiscarefulpreparation.该句中主

3、语从句是_，引导词为_。Whatisneededforawhatlongtrip2.ThatJayZhouwillcometomycityexciteseverybody.该句中主语从句是_，引导词为_。3.Whetherwewilltravelabroadornothasnotbeendecided.该句中主语从句是_，引导词为_。ThatJayZhouwillWhetherwewillcometomycitythattravelabroadornotwhether4.Whoeverknowsthesecretmustnttellothers.该句中主语从句_，引导词为_。5.Whythey

4、suddenlydisappearedstillremainsamystery.该句中主语从句是_，引导词为_。WhoeverknowsthewhoeversecretWhytheysuddenlydisappearedwhy6.Whatmanyscientistsbelieveisthatthecontiuedpresenceofwaterallowedtheearthtodissolveharmfulgasesandacidsintotheoceansandseas.该句中主语从句是_，引导词为_;that引导_从句.Whatmanyscientistsbelievewhat表语二、主语从

5、句的连接词二、主语从句的连接词及句法功能及句法功能用法归纳用法归纳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。例：Thatpricewillgoupiscertain.Whetherwegobytrainorbyboatmakesnodifference.1.从属连词：that、whether、ifthat无意义，不能省略whether意为“是否”，可置于句首句末，if不可置于句首_theboyplayssmartphonemadetheteacherangry.这个男孩玩手机这个男孩玩手机让老师很生气。让老师很生气。ThatTom国庆节回家，这让他父母感到很开心。ThatTomwi

6、llgohomeonNationalDaymakeshisparentshappy.他是不是我的孩子仍然是个问题。他是不是我的孩子仍然是个问题。_heismychildremainsaquestion.Whether【巩固练习】【巩固练习】用用whether或或if填空。填空。(1)Itdoesntmatter_hewillcomeornot.(2)_wellgocampingtomorrowdependsontheweather.(3)Itwasdoubtful_TomreallysawSharon.(4)_TomreallysawSharonwasdoubtful.whether/ifWh

7、etherwhether/ifWhether在句中不仅起连接词的作用，并充当句中的主语、宾语、表语或定语。2.连接代词:who、whoever、whom、whose、what、whatever、which、whichever例：Whatwedonthavealwaysattractsus.Whowillbethepresidentisstillunknown.在主语从句中作主语在主语从句中作宾语例：Wheneveryoucomeiswelcomed.随时欢迎你来Whoeverseesthegirlisattractedbyher.任何见到这个女孩的人都被她吸引。whenever在主语从句中作状

8、语_Ilikemostisyourhairstyle.我最喜欢的是你的我最喜欢的是你的发型。发型。What1、谁将赢得比赛还不知道。Whowillwinthematchisnotsure.2、我需要的就是休息。WhatIneedisrest.3、_ youlackisself-confidence.What4、_moreandmorestudentsgotouniversitiesistrue.That用法归纳用法归纳引导名词性从句时不仅起连接词的作用，也在句中作状语。Whenwellstarttomorrowwillbetoldsoon.Whyhecamehereisnotknown.3.连

9、接副词：when、where、how、whywhen作时间状语why作原因状语 _ thetrainwillarrivehasbeenannounced.When_willthetreesbeplantedhasnotbeendecided.Where引导引导词词作用作用引导词引导词作用作用that无词义无词义，在从句中在从句中不充当成分不充当成分，但不但不能省略能省略how“多么多么，怎样怎样”，作方式或程作方式或程度状语度状语who“谁谁”，作主语作主语、宾宾语语when“何时何时”，作时作时间状语间状语whom“谁谁”，作宾语作宾语where“在哪儿在哪儿”，作作地点状语地点状语what

10、“什么什么”，可作主语、可作主语、宾语、表语宾语、表语、定语定语why“为什么为什么”，作作原因状语原因状语which“哪一个哪一个，哪些哪些”，作作主语主语、宾语宾语、定语定语whether是否是否【巩固练习】用what或that填空。(1)_hetoldusthismorningwasjustalie.(2)_isimportanttousisenoughtime.(3)Itworriesmymom_sheisbeginningtogetalittlefat.(4)_welldoisleaveanoteforMumtotellherwewontbebacktilllate.WhatWhat

11、thatWhat【用适当的连接词填空。用适当的连接词填空。】(1)_willbesenttocarryoutthetaskhasntbeensettled.(2)Itdoesntmatter_itturnsouttobeagoodideaorabadidea.(3)_Johnwillarriveisunknown.(4)Itspossible_hehasntreceivedtheletter.Whowhether/ifWhenthat三、三、it it 作形式主语的主语从句作形式主语的主语从句语法精讲用法归纳用法归纳为了避免主语冗长，句子头重脚轻。经常用it作形式主语。例：Thattheear

12、thisroundisknowntoall.=Itisknowntoallthattheearthisround.it it作形式主语作形式主语句型精讲句型精讲clear,obvious,likely,probable,true句型一形容词1.It+be+形容词+主语从句做.是.的例：Itwassurprisingthatshepassedthedifficultexam.Itisnotclearwhetherhetoldalie.句型精讲句型精讲句型一Attention：此句型中的形容词是important,necessary等时，从句应该使用虚拟语气。例：Itisimportantthat

13、we(should)learnEnglishwell.said,reported,believed,thought,announced句型二过去分词2.It+be+过去分词+主语从句据.例：Itissaidthattheyareidenticaltwins.Itisreportedthatabigearthquakehitthearea.句型精讲句型精讲句型二Attention：如果过去分词是suggested,ordered,required,advised,requested等表示建议、要求、命令等词时，从句应该使用虚拟语气。例：Itissuggestedthatstudents(shou

14、ld)maketheirbedbythemselves.句型精讲句型精讲apity，anhonor，agoodidea，afact,a/nosurprise，nowonder.句型三名词3.It+be+名词+主语从句做.是.的例：Itisapitythathemissedsuchaninterestingfilm,Itisgoodnewsthathehasrecovered.句型精讲句型精讲seem,happen,appear,look,occur,turnout句型四不及物动词4.It+不及物动词+主语从句例：Ithappenedthattheywereoutthatday.碰巧那天他们不在

15、家。Itseemsthatitisgoingtorain.看起来要下雨了。句型精讲句型精讲worry,shock句型五及物动词5.It+及物动词+宾语+主语从句例：Itshocksmethathefailedinthisexam.他没通过考试，震惊到我了。1._isafactthatEnglishisbeingacceptedasaninternationallanguage.解析：本题考查“It+be+名词+that的主语从句”，其中it位于句首作形式主语。语法填空语法填空考点追击考点追击It2.Itisuncertain_hecancometoJennysbirthdaypartyorno

16、t.解析：在主语从句中不缺成分，缺少“是否”的概念，用whether。whether3._hemadeanimportantspeechatthemeetingwastrue.解析：主语从句中，不缺成分，用that引导。考点追击考点追击That4._isknowntousallthatAmericaisadevelopedcountry.解析：thatAmericaisadevelopedcountry是真正的主语从句，句首用it充当形式主语。It四、四、主语从句的主谓一致主语从句的主谓一致语法精讲1.Whetherthepatientwillbetaken_unknown.2.Whenand

17、wherethepatientwillbetaken_unknown.主句的谓语动词，大多数使用主句的谓语动词，大多数使用_ _ (单数？复数？单数？复数？)由两个连接词引导同一个主从，谓动使用由两个连接词引导同一个主从，谓动使用_ _ (单数？复数？单数？复数？)单数单数单数单数isis3.Whenthetaskcanbefinishedandwhetherhecanhavearest_unknown.4.Whathewantsmost_stayingwithhisfamily.Whattheyneed_masks(口罩).主语为主语为andand连接的两个主从时，谓动使用连接的两个主从时，

18、谓动使用_ _ (单数？复数？单数？复数？)whatwhat在主从中做宾语时，谓动由在主从中做宾语时，谓动由_决定决定单复数单复数(主语？表语？主语？表语？)复数复数表语表语areis are1、Whatyousaid_ ofgreatimportance.is2、_canjoininthesportmeetisdecidedbytheteacher.Who3、_itwillrainornotisnotclear.Whether4、Whatyouleft_ severalbooks.are【常见错误展示】下列各句均有一处错误，请改正并分析原因。Thatthat虽无词义但引导主语从句位于句首时不

19、能省略。1.Lighttravelsfasterthansoundiscommonknowledge.if,whether都可表示“是否”,但if不能引导句首主语从句。2.Ifshescomingornotdoesntmattermuch.Whether3、Thattheprofessorsaidisofgreatimportance.Whatthat引导主语从句时无词义。Whattheprofessorsaid表示“教授所说的”。4.Where will the trees be planted has not been decided.将will置于trees之后。主语从句要用陈述句语序。5.No matter who breaks the rule will be punished.Whoever主语从句表示单一概念时，谓语要用单数形式。6、Whenandwherethemeetingwillbeheldstillremainaquestion.remains主语从句表示单一概念时，谓语要用单数形式。