Unit 5 Working The Land Discovering Useful Structures 主语从句（ppt课件）-2022新人教版（2019）《高中英语》选择性必修第一册.pptx

1、添加标题主语从句添加标题1.Learn to understand the use of subject clauses in context by introducing Yuan Longping.2.Get more information about the topic context and deepen the understanding of the meaning of the topicLearning Aims添加标题Lead inWhat concerned Yuan most while he was young?What concerned Yuan most was

2、 that famers had poor harvests.What did he choose to study in college?What he chose to study was agriculture.添加标题Review and ExploreActivity 1 Circle the subject in each sentence.1.He considered himself a farmer.2.Yuans innovation has helped to feed more people.3.Using salty land in China for rice pr

3、oduction was his latest vision.4.How this could be done was a challenging question at the time.5.What concerned Yuan Longping most was that famers often had poor harvest.添加标题Review and ExploreActivity 2 Unerline the subject clauses in these cases and circle the leading words（引导词）（引导词）of the subject

4、clauses.1.That Yuan Longping cared little for celebrity or money was true.2.Whether it was possible to develop the hybrid rice was in debate.3.Who will solve the soil problem is unknown.4.When Yuan would retire to a life of leisure was never mentioned.5.What concerned Yuan Longping most was that fam

5、ers often had poor harvest.6.Where the hybrid rice can be planted is a question.7.Why Yuan developed seawater rice was to feed more people.添加标题Classify and Summarizesubordinating conjunctions从属连词句子成分完整句子成分完整that、whether、ifThat the gun powder was first invented by the Chinese is known to us all.总所周知，

6、火药最早是中国人发明的。Conjunctional Pronouns连接代词在句子中充当一定的成分（主语，宾语，标语）在句子中充当一定的成分（主语，宾语，标语）what who which whatever whoeverWhat caused the accident is still a mystery.导致这起事故的原因仍然是个迷。Conjunctional Adverbs连接副词在从句中做状语在从句中做状语how when where whyHow we can help the twins will be discussed at the meeting.我们将会在会议上讨论如何帮助

7、那对双胞胎。Leading words（引导词）（引导词）of subject clauses.添加标题Whats the differences between theseleading words?连接代词在引导主语从句时，在从句中可以作主语、宾语、表语、或定语。Who will go to the concert is not known.不知道谁会去音乐会。连接副词在引导主语从句时在从句中可以作状语。How this happened is not clear to anymore.这件事怎样发生的，谁也不清楚。从属连词（that/whether/if)在从句中不充当任何句子成分，本身

8、无任何意义，只起连接作用，但不可省略。That she survived the accident is a miracle.这件事怎样发生的，谁也不清楚。添加标题Complete the following sentences and focus on the word order in subject clausesTranslate and Summarize1._（袁隆平选择在哪里学习）was not an accident.2._（他是否能研发出杂交水稻）was not clear then.3._（杂交水稻如何提高产量）is highly expected.Where Yuan c

9、hose to study argricultureWhether he could develop the hybrid riceHow the hybrid rice will expand outputAttention!主语从句用_语序添加标题Observe and SummarizeSubject-Predicate Agreement（主谓一致）（主谓一致）That he will go to the concert is not known.How this happened is not clear to anymore.Which book I shall choose ha

10、snt been decided.主语从句作主语时，句子谓语一般用主语从句作主语时，句子谓语一般用_。添加标题Activity 3.Explore the structure of the following sentencesObserve and AnalyzeIt is estimated that about 60%of Chinas rice consumption is fromYuans hybrid strains.主句从句位于句首时，有时候会显得很笨重。这时常把主语从句移到句末，用主句从句位于句首时，有时候会显得很笨重。这时常把主语从句移到句末，用it作形式主语。作形式主语。

11、That about 60%of Chinas rice consumption is from Yuans hybrid strains is estimated.形式主语形式主语主语从句作真正的主语主语从句作真正的主语添加标题Obeserve and Summsrize 1.It+be+adj(obvious,true,natural,strange.)+主语从句主语从句It is important that he should know about this.他应该知道此事，这很重要。主语从句中用主语从句中用it作主语的句型作主语的句型2.It+be+名词词组（名词词组（no wond

12、er,an honour,apity,a/no surprise.)+主主语从句语从句Its a pity that he didnt come.很遗憾他没来。若形容词为若形容词为important,necessary,strangeimportant,necessary,strange等，主语从句中的等，主语从句中的谓语用谓语用“(should)+do(should)+do”添加标题Obeserve and Summsrize 3.It+be+过去分词（过去分词（said,suggested,reported,thought,expected,proved.)It was suggested

13、 that the work(should)be done with great care.据建议，做这份工作时应该小心翼翼。主语从句中用主语从句中用it作主语的句型作主语的句型若过去分词为若过去分词为suggested,ordered,required,advisedsuggested,ordered,required,advised等，主等，主语从句中的谓语用语从句中的谓语用“(should)+do(should)+do”4.It+不及物动词（不及物动词（happen,seem,appear,remain.)+主语从句主语从句It seems that it is going to rai

14、n.他应该知道此事，这很重要。5.It+及物动词及物动词+宾语宾语+主语从句主语从句It surprised him why they came to visit him suddenly.让他吃惊的是他们为什么突然来看他。添加标题Assess your progressActivity 4.Circle and correct the mistake in each sentence.1.How can we find a solution to prodece sufficient food is an important topic for us to research.2.That t

15、he lifestyle is slower and healthier are the reason why some people prefer to live in the country.3.That worries many people is that these chemicals may even cause cancer.4.What amaze all of us that vegetables can be planted without any soil.添加标题Summary 主语从句三要素主语从句三要素How he became a great scientist is known to us all.主语从句不能省略引导词主语从句不能省略引导词主语从句用主语从句用陈述句陈述句语序语序主语从句做主语时，句子谓语动词一般用主语从句做主语时，句子谓语动词一般用单数单数添加标题Write a short paragraph(80 words)to introduce a great person like Yuan Longping using the subject clauses when neccessary.Homework添加标题Thanks!