【课件】Unit+5Discover+Useful+Structures+主语从句课件人教版（2019）选择性必修第一册.pptx

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1、Unit 5Working the LandWho is known as the Father of Hybrid?Yuan Longping is known as the Father of Hybrid?What is his life pursuit?Keeping all the people away from hunger is his life pursuit.What impressed people most about him?(para.5)What impressed people most was his ongoing ability to fulfil his

2、 dreams.如果一个从句在句子中担当主语，那么这个从句就是主语从句。Definition of subject clauseCombinethetwosentencesintoone.Yuan had realised his dream of seawater rice.It surprised the whole world.That Yuan had realised his dream of seawater ricesurprisedthewholeworld.Combinethetwosentencesintoone.Was it possible to develop a h

3、ybrid of self-pollinating plants?It was a matter of great debate.Whether it was possible to develop a hybrid of self-pollinating plants such as rice was a matter of great debate.Combinethetwosentencesintoone.What concerned Yuan Longping most?farmers often had poor havests and sometimes even had a se

4、rious shortage of food to eat.Whatconcernedhimmost was that farmers often had poor harvests and sometimes even had a serious shortage of food to eat.Combinethetwosentencesintoone.How could farmers boost yields?It was a challenging question.How farmers could boost yields was achallengingquestion.主语从句

5、的引导词主语从句的引导词例词例词说明说明that在从句中均不作成分，只起连接作用；无实义在从句中均不作成分，只起连接作用；无实义whether在从句中均不作成分，只起连接作用在从句中均不作成分，只起连接作用,表示表示“是否是否”。连接代词连接代词who,whom,what,which,whoever,whatever等等在从句中作主语、宾语、表语、定语等名词性成分。在从句中作主语、宾语、表语、定语等名词性成分。连接副词连接副词when,where,how,why,whenever,wherever等等在从句中作时间、地点、方式、原因状语等副词性成分。在从句中作时间、地点、方式、原因状语等副词性

6、成分。主语从句的本质：用三种句子主语从句的本质：用三种句子-陈述句、一般疑问句、特殊疑问句，在另一个句子中陈述句、一般疑问句、特殊疑问句，在另一个句子中做主语。做主语。三种引导词：三种引导词：that,whether,that,whether,和疑问词（关系代词和疑问词（关系代词+关系副词）。关系副词）。Completethesentencesusingwhat,whether,where,when,who,why,howorthat.1._isneededforsuccessisyourhardwork.2._wewillgotoBeijinghasbeenknowntoeveryone.3

7、._canjoininthesportmeetisdecidedbytheteacher.4._itwillrainornotisnotclear.6._theearthisasolidballisknowntousall.WhatThatWhoWhetherThat5._theearthisbecomingwarmisagoodtopicforresearch.Why思考思考2 2：主语从句主语从句主谓一致主谓一致问题问题1.Whetherthepatientwillbetaken_unknown.2.Whathewantsmost_stayingwithhisfamily.Whatthey

8、need_masks(口罩口罩).3.Whenandwherethepatientwillbetaken_unknown.4.Whenthetaskcanbefinishedandwhetherhecanhavearest_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？)主语为主语为and连接的两个主从时，谓动使用连接的两个主从时，谓动使用_(单数？复数？单数？复数？)what在主从中做宾语时，谓动由在主从中做宾语时，谓动由_决定单复数决定单

9、复数(主语？表语？主语？表语？)单数单数单数单数复数复数表语表语isisareisare主语从句应使用_语序。1.Wherewewillhaveapicnicshouldbediscussed.Wherewillwehaveapicnicshouldbediscussed.2.Howwegoforapicnicshouldbediscussed.Howdowegoforapicnicshouldbediscussed.Rule 3陈述句陈述句思考思考1 1：主语从句的主语从句的语序语序Thatallcountriesworktogetherisimportant.思考思考3 3：主语从句太长怎

10、么办？主语从句太长怎么办？用一个用一个 It 来解决问题！来解决问题！Itisimportantthatallcountriesworktogether.1.It+be+形容词 that从句It is necessary/important/obvious/.that2.It+be+-ed分词 that从句It is believed that 人们相信It is known to us all that.众所周知It has been decided that 已经决定3.It+be+名词 that从句It is common knowledge that 是常识It is a surpri

11、se that.令人惊奇的是It is a fact that 事实是4.It+不及物动词 that从句It appears/seems that 似乎It happens that.碰巧It turns out that 结果证明是it作形式主语的四种句型5.It V sb.that 某人突然想起某事1.It dawned upon/on sb.that.2.It occurred to sb.that.3.It hit/struck sb.that.主语从句句型Ex.on P90定 义主语主语从句从句引导词形式主语主谓一致总 结 作用，位置 从属连词，连接代词，连接副词 单个主语从句-单数

12、多个主语从句-复数 Itbe形容词/名词短语/过去分词/不及物动词 that从句语序 陈述语序PracticePractice(P53)(P53)Match the sentence parts,and then translate the completedsentences into Chinese.Pay attention to how the subjects areintroduceddifferently.1._remainsanunansweredquestion.2._isanimportanttopicforustoresearch.3._isthatthesechemic

13、alsmayevencausecancer.4._thesevegetablescanevenbeplantedwithoutanysoilthroughthisnewtechnology.5._isthereasonwhysomepeopleprefertoliveinthecountryratherthaninthecity.A.WhatworriesmanypeopleB.ThatthelifestyleisslowerandhealthierC.Howwecanfindasuitablesolutiontoproducesufficientfoodwhilekeepingtheenvi

14、ronmentsafeD.WhenthesewheatfarmerswilljointhispilotexperimentE.ItamazedallofusthatD DC CA AE EB BReadthepassageandunderlineallthesubjectclauses.Theninpairs,discusswhetherthesentenceswithsubjectclausescanbeparaphrased.GrandmaGrandma hashas beenbeen complainingcomplaining aboutabout thethe vegetablesv

15、egetables soldsold inin thethesupermarket,supermarket,whichwhich havehave beenbeen growngrown usingusing chemicalchemical fertilisers.Tofertilisers.To her,her,thatthattheytheylooklookbeautifulbeautifulononthetheoutsideoutsideisisobvious.obvious.However,However,whatwhatshesheisisunhappyunhappy abouti

16、saboutis thethe lowerlower nutritionalnutritional valuevalue andand reducedreduced flavour.flavour.NowNowthatthatbothbothofofmymygrandparentsgrandparentshavehaveretiredretiredfromfromtheirtheirjobsjobsininthethecity,howcity,howtheythey areare goinggoing toto spendspend theirtheir retirementisretirem

17、entis anan importantimportant decisiondecision forforthem.Whetherthem.Whether theythey cancan livelive a a healthyhealthy lifeislifeis thethe firstfirst thingthing theythey areareconsidering.considering.SoSotheytheyhavehavemademadeupuptheirtheirmindsmindstotomovemovetotothethecountryside,countryside

18、,wheretheycanliveagreenlife.wheretheycanliveagreenlife.WhatqualitiesdoyouthinkmakeapersonlikeYuanLongpingsosuccessful?Work in groups.Have a discussion and prepare apresentation.Thefollowingpointsandexpressionsmayhelpyou.his/herdeterminationtotacklethecrisisofhis/herintenseefforttoovercomehis/herdrea

19、mtodevelophis/herloveandcareforhe/shesucceededinhe/shenevergaveuphe/sheisdevotedto Whatimpressesmemostisthat Whatmakeshim/heragreatisthat Itisimportantthat Whetherdependson Thatishis/hermostimportantquality.1._ismorewater.(连接代词连接代词what在从句中作在从句中作need的宾语的宾语)我们需要的是更多的水。我们需要的是更多的水。2._dependsonthetraffic

20、.我们是否能按时到达那里由交通情况而定。我们是否能按时到达那里由交通情况而定。3._willtakeoffdependsmuchontheweather.延迟的航班什么时候起飞主要取决于天气状况。延迟的航班什么时候起飞主要取决于天气状况。4._wasneverclear.谁都不清楚那个人为什么没更早一点报告那起事故。谁都不清楚那个人为什么没更早一点报告那起事故。5._isstillunknown.这封信是谁寄的尚不清楚。这封信是谁寄的尚不清楚。WhatweneedWhetherwecanarrivethereontimeWhenthedelayedflightWhythemanhadntreportedtheaccidentsoonerWhotheletterwasfrom