Unit5 Grammar（ppt课件）-2022新人教版（2019）《高中英语》选择性必修第一册.pptx

1、Unit5 Grammar探究发现However,what concerned him most was that farmers often had poor harvests and sometimes even had a serious shortage of food to eat.How this could be done was a challenging question at the time.However,whether it was possible to develop a hybrid of self pollinating plants such as rice

2、 was a matter of great debate.Today,it is estimated that about 60 percent of domestic rice consumption in China is comprised of crops generated from Yuans hybrid strains,and his strains have allowed Chinas farmers to produce around 200 million tonnes of rice per year.What impressed people most about

3、 Yuan Longping was his ongoing ability to fulfil his dreams.我的发现(1)以上红体部分在句中作_(2)句中的what在从句中作_(3)句中的how在从句中作_句中的whether意为：_(4)句中it是 _,正真的_ 是后面的that引导的从句。主语主语状语是否形式主语主语一、定义在主从复合句中用作主语的从句叫主语从句。What made people excited was that the solarship had completed an around-the-world trip.让人们激动的是太阳能船已完成了环游世界的旅行

4、。It worried the mother that her son was always playing computer games.她的儿子一直在玩电脑游戏，这让这位母亲很担心。要点规则详析分解1.连接词that和whether/if(1)that引导主语从句时，在从句中不充当任何句子成分，也没有实际意义，只起连接作用，但不可省略。That she survived the accident is a miracle.她在事故中幸免于难简直是个奇迹。(2)whether/if引导主语从句时，在从句中不充当任何句子成分，起连接作用，意为“是否”，不可省略，有时也可用t作形式主语代替。Wh

5、ether the plan will be carried out is still unknown.=It is still unknown if/whether the plan will be carried out.这个计划是否会实施还不知道。名师点津whether引导的主语从句既可放在句首也可放在句尾，但if引导的主语从句不可以位于句首，可用it作形式主语，if引导的从句后置作真正主语。二、主语从句的连接词及其句法功能_ made us very happy.她能来帮助我们使我们很高兴。_doesnt matter too much.她来不来都无关紧要。即使训练 1 补全对话Tha

6、t she could come to help usWhether she is coming or not Whichever(of you)comes in first will receive a prize.无论（你们）谁先到都可以得到奖品Who will go to the concert is not known不知道谁会去听音乐会。Whatever you do in your spare time should do no harm to others.无论你在业余时间做什么，都不应该伤害其他人。名师点津who引导的主语从句表示一件事情，而whoever引导的主语从句指人。2

7、.连接代词(who,whose,whom,what,which,whichever,whoever,whomever,whatever)连接代词引导主语从句，在从句中可以作主语、宾语、表语或定语。How this happened is not clear to anyone.这件事是怎样发生的，谁也不清楚。When we will have a meeting is an important question.我们何时举行会议是个重要的问题Where I spend my summer vacation is no business of yours.我在哪里过暑假不关你的事。名师点津名词性

8、从句引导词的确定步骤：(1)(1)分析句式结构，明确名词性从句在句中的功能；分析句式结构，明确名词性从句在句中的功能；(2)(2)明确名词性从句所表达的意义；明确名词性从句所表达的意义；(3)(3)明确名词性从句中所需要的成分及意义；明确名词性从句中所需要的成分及意义；(4)(4)确定从句的引导词确定从句的引导词3.连接副词(when,where,how,why,whenever,wherever,however等)连接副词引导主语从句并在从句中作状语。(2017，北 京高考)Every year,_makes the most beautiful kite will win a prize

9、in the Kite Festival.(20l6北京高考)Your support is importantto our work._ you can do helps._ we understand things has a lot to do with what we feel._ Li Bai,a great Chinese poet,was born is known to the public,but some wont accept it._ John was late for the class has been unexplained._ part of the count

10、ry he will travel to needs discussing._ the English party will be held has not yet been decided._ surprises me most is that he is too proud.即时训练2用适当的连接代词或连接副词填空whoeverWhateverHowWhereWhyWhichWhere/WhenWhatl.It+be+形容词(obvious,true,natural,strange等)+主语从句.It is important that he should know about this

11、他应该知道此事是重要的名师点津在“It十be十形容词十主语从句.”结构中，若形容词为important/necessary/strange等，主语从句中的谓语用“should+动词原形”形式，其中should可省略2.It+be十名词词组(no wonder,an honour,a pity,a/no surprise等)+主语从句.Its a pity that he didnt come.很遗憾他没来。3.It+be+过去分词(said,reported,thought,expected,proved等)十主语从句It is suggested that the meeting be pu

12、t off.有人建议会议延期召开。名师点津在“It十be十过去分词十主语从句.”结构中，过去分词若为suggested/.ordered/required/advised等，主语从句中的谓语用“should十动词原形”形式，其中should可省略。4.It十不及物动词(happen,occur等)十主语从句It happens that his sister is my good friend.碰巧他姐姐是我的好朋友。5.It十及物动词十宾语+主语从句。It surprised him why they came to visit him suddenly.让他吃惊的是他们为什么突然都来看他：

13、三、主语从句中用t作形式主语的结构(2020江苏本考)It is not a problem _ the battle;its just a matter of time.我们能否打赢这场战斗不是问题，这只是时间问题。(20l6江苏高考)It is often the case _ for those who hang on to hope.通常情况下，对于那些心存希望的人，一切皆有可能。_ that the old man should go to the countryside to have a rest.建议这位老人到乡村休息一下。_ that you disagree with th

14、e plan.在我看来，你好像不赞成这个计划。_ the harvest was bad that year.碰巧那年收成不好。即使训练3 （1）补全句子whether we can winthat is anything is possibleIts suggestedIt seems to meIt happened thatThat he suddenly fell ill last month surprised us._ he suddenly fell ill last month.Whether they will sell the house hasnt been yet de

15、cided._they will sell the house.That light travels in straight lines is known to us all._ light travels in straight lines.即使训练3 （2）句型转换It surprised us thatIt hasnt been decided yet whetyherIt is known to us all that1.从句要用陈述语序What we will do next should be decided.应该决定一下我们下一步该做什么。2.主谓一致 (1)从句作主语时，主句的

16、谓语一般用单数形式。Where he will get a job after graduation has puzzled him much.on毕业后到哪儿找份工作使他很困惑名师点津what引导主语从句时，如果主句包含“be动词十名词”，be动词应与主句中作表语的名词保持一致。What the school needs most are books.这所学校最需要的是书。(2)由and连接两个或两个以上的主语从句作主语时，谓语动词用复数；由两个或多个连接词引导一个主语从句时，谓语动词用单数。When they will start and where they will go have n

17、ot been decided yet.他们将在什么时候动身以及要去哪里还没定下来。When and where they will hold the meeting is not clear.他们何时何地召开会议还不清楚四、主语从句中应注意的问题What surprised me most _(be)that the man in rags was a millionaire.What he needs most _(be)money.When and where the meeting will be held _(decide)already.That the coal workers are still alive _(be)a wonder即使训练4 用所给词的适当形式填空 wasishas been decidedis