Unit 5 Working the land Discover useful structures （ppt课件）-2023新人教版（2019）《高中英语》选择性必修第一册.pptx

1、授课时间：10月31日授课教师：蒋阳授课内容：Unit 5-grammer 主语从句教学目标：1.学生能够理解主语从句连接词的使用规则，并能准确运用主语从句进行自主表达。2.通过引导学生观察例句，总结出主语从句的语法规律。帮助学生学会观察、比较、分析、推断、归纳、建构等思维方式。教学重点：1.掌握主语从句的引导词的使用规则。教学难点：1.主语从句在语境中的使用。2.结合语法知识，以课堂教学为依托，全面训练，加强和提高运用英语的综合能力。Learning ObjectivesIn todays class,you are expected to:1.understand the differen

2、ces between independent clauses and dependent clauses.2.analyze the distinctions between different conjunctions.3.use proper conjunctions to lead subject clauses.句子句子 类型类型简单句简单句并列句并列句复合句复合句主句主句形容词性从句形容词性从句(定语从句定语从句)名词性名词性从句从句副词性从句副词性从句(状语从句状语从句)主语从句主语从句宾语从句宾语从句表语从句表语从句同位语从句同位语从句从句从句Noun clauses as t

3、he subjectPart 1主语从句基本概念 What Yuan Longping really cared about was not money or celebrity.That Yuan Longping had realised his dream of seawater rice surprised the whole world.Subject Subject Look at the complex sentences and state the functions of the noun clauses italicised.Activity 1 That Yuan Lon

4、gping had realised his dream of seawater rice surprised the whole world.It surprised the whole world that Yuan Longping had realised his dream of developing seawater rice.用用it作形式主语作形式主语 Activity 1Look at the complex sentences and state the functions of the noun clauses italicised.1.主语从句的定义：用来_的从句，属于

5、_从句，位于_，有形式主语it时，则位于_。e.g.1).Whether she will accept the invitation is not clear yet.2).When we will hold the sports meet has not been decided on yet.3).It is possible that everyone goes to a satisfactory university if they study hard.2.主语从句的连接词：_ 用于引导陈述句，只起连接作用，无含义，不充当成分，不可省略。_ 用于引导一般疑问句，起连接作用，翻译为“

6、是否”，不充当成分，不可省略。_用于引导特殊疑问句，起连接作用，翻译为相应的疑问含义，在从句中作主，宾，表，作主，宾，表，定定；不可省略。_ 用于引导特殊疑问句，起连接作用，翻译为相应的疑问含义，在从句中作状语状语，不可省略。Finish exercise 2 on page 58.1._ the research centre is to be set up has not been decided.2._ many countries still face food shortages remains a big problem.3._ impressed me most was that

7、 the hybrid rice enabled farmers to expand their ouput greatly.4._ the plan is to be carried out still needs discussing.5._ the new chemical pesticide is effective remains to be seen.6._ will join in the research team will be announced tomorrow.7._ he quit his high-paying job is not difficult to und

8、erstand.He wanted to start up his own business.Whether/WhereThatWhatWhether/WhenWhetherWhoWhy3.形式主语：由that引导的主语从句，为了避免头重脚轻，主语从句会置于句尾，而用_作形式主语。That the doctor couldnt save the patient was obvious.It was obvious that the doctor couldnt save the patient.That Yuan Longping had realized his dream of devel

9、oping seawater rice surprised the whole world.It surprised the whole world that Yuan Longping had realized his dream of developing seawater rice.It+be+形容词形容词+that 从句从句(obvious,true,surprising,good,wonderful,funny,possible,likely,certain,probable,etc.)It is likely that she will do well in her exam.It

10、+be+名词词组名词词组+that 从句从句 (an honour,a fact,a pity,etc)Its a pity that we cant travel abroad this summer.Step 3:Further exploration3.形式主语：.It+be+过去分词过去分词+that 从句从句(said,reported,thought,expected,decided,announced,proved;etc.)It is said that Mr.Green has arrived in Beijing.It+不及物动词或短语不及物动词或短语+that 从句从句(

11、seem,happen,doesnt matter,turn out).It turned out that the salesman was a liar.It happened that she was out when we called.It doesnt matter whether she will come or not.结果是，原来是结果是，原来是碰巧碰巧Step 3:Further exploration3.形式主语：Part 2主语从句中的八个点1.从句语序改错：1).What have I forgotten is that I have a test today.2).

12、Where had he lost the laptop was what we wanted to know.3).Whether do they use too many chemical pesticides is unknown.4).Who did this is still a mystery.总结：在任何情况下，主语从句都用_。2.主句谓语动词的选择：填空：1).What you said at the meeting _(describe)a bright future for the company.2).Whether it will rain or not_(be)not

13、 clear.3).That he has won so many awards_(surprise)us.4).When he left us and Why he did that _(remain)unknown to us.5).What we need_(be)more personal computers.6).What we need _(be)more time.2.主句谓语动词的选择：总结：单个主语从句作主语，描述的是一件事情，所以谓语动词用_。两个或多个从句作主语，描述的是多个事情，谓语动词用_。由what 引导主语从句时，谓语与_保持一致。3.时态的选择 填空：1).Wh

14、at_(cause)the accident yesterday still remains unknown at present.2).What you _(achieve)in the future is decided by what you are doing now.3).How we _(get)here in ten days was discussed at the meeting yesterday.4).That he_(lose)his balance made him slip on the ice.5).Last week,that the earth _(turn)

15、from west to east was said to us by our geography teacher.3.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_。4.that 的省略 填空：1)._ he was ill yesterday is known now.2).It happened _ I had no money with me that day.总结：无论陈述句的主语从句谓语句首还是句尾，_.5.if/whether 的选择填空：1)._ it will rain or not is not clea

16、r.2).It is uncertain _ he will leave for Beijing tomorrow.3).It doesnt matter _ you pay by cash or credit card in this store.4).It is still unknown _ the big boss can come or not.总结：主语从句位于_，只能用whether;主语从句置于_，可用if/whether;但如有_,或者_，则只能用whether.6.what 的使用填空并翻译：1)._ can help us solve this problem is st

17、ill unknown to us._能够帮我们解决这个问题还不清楚。2)._ struck me most in the movie was the fathers deep love for his son.电影中_是父亲对儿子深深的爱。3)._ matters most is to start acting now._现在要行动起来了。4)._ he said is reasonable._是合理的。6.what 的使用5)._ worries many people is that these chemicals may even cause cancer._是这些化学品甚至会引发癌症

18、。6)._ he was ten years ago is totally different from what he look like now.他_和现在有很大的不同总结：what 在主语从句的基本含义是 _；但更多时候，翻译为_;_等，做题时的关键是看_。更重要的是，熟记典型例句。补充what在其他名词性从句中的用法填空并理解what 的含义：1).He saves _ he earns.(_)2).He is no longer _ he was.(_)3).He is_ is generally called a fool.(_)4).Our income is now doubl

19、e _ it was ten years ago.(_)5).After _seemed like hours he came out with a bitter smile.(_)6).This is _ they call Salt Lake City.(_)7)._ makes the book so extraordinary is the creative imagination of the writer.(_)7.that 与what 的选择填空：1)._ light travels in straight lines is known to all.2)._ we need i

20、s more time.3).It is clear _ he was not fit for the work.4).It is by no means clear_ the president can do to end the strike.总结：that 引导_，what引导_。使用what时，从句一定缺少_；而而that 则不充当成分，只做连接词。则不充当成分，只做连接词。8.主语从句与分词短语作主语句型转换：1).That he lost his balance made him slip on the ice._made him slip on the ice.2).That h

21、e was ill yesterday is known now._is known now.3).That you have recovered from your illness is a great relief to us._ is a great relief to us.4).That he was misunderstood by the teacher made him very upset._ made him very upset.8.主语从句与分词短语作主语 总结：主语从句可与现在分词转换，即把从句主语换为_，谓语动词换为_，构成_;被动形式为_.这样的句子结构在作文中作

22、文中是简化句型，提升句型运用能力的很好表现。Step 3:Further explorationFinish exercise 2 on page 53.?Grandma has been complaining about the vegetables sold in the supermarket,which have been grown using chemical fertilizers.To her,that they look beautiful on the outside is obvious.However,what she is unhappy about is the

23、lower nutritional value and reduced flavour.Now that both of my grandparents have retired from their jobs in the city,how they are going to spend their retirement is an important decision for them.Whether they can live a healthy life is the first thing they are considering.So they have made up their

24、 minds to move to the countryside,where they can live a green life.Step 4:DrillingUnderline the subject clauses in the passage.1.They should like each other is natural.2.If Mary really heard him is really doubtful.3.That is certain that we can win.4.No matter who breaks the window shall apologize.Th

25、at theyWhetherItWhoeverStep 4:DrillingCorrect the following sentences.1.Rewrite the sentences using subject clauses1.We wanted to know where he had lost the laptop.Where _ was what we wanted to know.2.The way in which he did the experiment was puzzling to other people.How _ was puzzling to other peo

26、ple.3.Do they use too many chemical pesticides?I worry about this most.Whether _ is what I worry about most.he had lost the laptophe did the experimentthey use too many chemical pesticides1.Rewrite the sentences using subject clauses4.People are happy to see that the living conditions and income of

27、the farmers have improved a lot.That _ makes people happy.5.We have not decided on the date for the sports meet yet.When _ has not been decided on yet.the living conditions and income of the farmers have improved a lotthe sports meet will be held2.Make sentences using subject clauses with the help o

28、f the cues.Examplehe thought/completely wrongWhat he thought was completely wrong.1.he said/reasonable_2.she will accept the invitation/not clear yet_What he said seems reasonable.Whether she will accept the invitation is not clear yet.2.Make sentences using subject clauses with the help of the cues

29、.3.the animals are moving to/not exactly known_4.you have recovered from your illness/a great relief to us_5.he has become distant recently/my concern_Where the animals are moving to is not exactly known.That you have recovered from your illness will be a great relief to us.That he has become distan

30、t recently is my concern.3.Circle and correct the mistake in each sentence.1.What have I forgotten is that I have a test today.2.Who left me these flowers are not clear to me.3.This is obvious that students should prepare well for their future.4.Whos ticket this is has not been confirmed.5.When the

31、test will be given have not been decided.I haveisItWhosehas1.Can we control pests without causing any ill effects?This still remains a question.(Whether)2.Agriculture is the foundaton of our country.This is well known.(It)3.Some less-developed countries are suffering from food shortages.It is a seri

32、ous problem in the world.(That)4.Some herdsmen in Inner Mongolia fix electronic sensors to their cattle to monitor their movements.It is true that they are doing this.(It)Step 4:DrillingCombine each pair of sentences using the word in brackets.1.Whether we can control pests without causing any ill e

33、ffects remains a question.2.It is well known that agriculture is the foundation of our country.3.That some less-developed countries are suffering from food shortages is a serious problem in the world.4.It is true that some herds men in Inner Mongolia fix electronic sensors to their cattle to monitor their movements.Step 4:DrillingCombine each pair of sentences using the word in brackets.THANK YOU