Unit 5 Discovering Useful Structures 主语从句ppt课件- （新教材）高中英语人教版选择性必修第一册.pptx

1、Activity 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 production was his latest vision.4.How this could be done was a challenging question at the time.5.What concerned Yuan Longping most

2、was that farmers often had poor harvests.When a sentence serves as subject,we call it Subject Clause.Review and ExploreSubordinating conjunctions从从 属属 连连 词词Conjunctional Pronouns连连 接接 代代 词词Conjunctional Adverbs连连 接接 副副 词词what,who,whom,whose,which，whoever,whatever,whichever（强调无论是（强调无论是）that,whetherwh

3、en,where,how,why Leading words(引导词)of subject clauses(无意义）无意义）(是否）是否）（不作成分）（不作成分）（作主、宾、表、定语）（作主、宾、表、定语）（均有各自意义）（均有各自意义）（作状语，均有各自意义）（作状语，均有各自意义）Classify and SummarizeComplete the following sentences and focus on the word order in subject clauses.1._Yuan Longping chose to study agriculture(袁隆平选择在袁隆平选择

4、在哪里学习农业）哪里学习农业）was not an accident.2._ he could develop the hybrid rice(他是否能研发出杂交他是否能研发出杂交水稻水稻)was not clear then.3._ the hybrid rice will expand output(杂交水稻将如何提高产杂交水稻将如何提高产量量)is highly expected.HowWhere Whether主语从句用主语从句用 _语语 序序!陈陈 述述 Translate and SummarizeThat he will pass the exam is certain.How

5、she keeps healthy is a secret.Which book I shall choose hasnt been decided.主语从句作主语时，句子谓语主语从句作主语时，句子谓语一般用一般用_。单单 数数 Subject Predicate Agreement （主谓一致）Observe and SummarizeActivity 3 Explore the structures of the following sentences.is estimated that about 60%of Chinas rice consumption is from Yuans h

6、ybrid strains.That about 60%of Chinas rice consumption is from Yuans hybrid strains is estimated.ItIt作形式主语作形式主语主语从句作真正的主语主语从句作真正的主语It Observe and AnalyzeIt is that he/she is devoted to a fact important well-knownestimated It 作形式主语的常见结构said reported Observe and Summarize1.That the earth moves around

7、the sun is well known.It is well known that the earth moves around the sun.2.It is a pity that she has made such a mistake.That she has made such a mistake is a pity.注意：主语从句位于句首时,不能用if 引导。whether 与与 if 引导主语从句：引导主语从句：如果主语从句位于句首，不能用如果主语从句位于句首，不能用if引导，引导，此时，只能用此时，只能用whether。但如果用但如果用it作形式主语，而把主语从句放在句作形式

8、主语，而把主语从句放在句末时，也可以用末时，也可以用if引导。引导。用用 whether 或或 if 填空填空1.It doesnt matter _ he will come or not.2._ well go camping tomorrow depends on the weather.3.It was doubtful _ Tom really saw Sharon.whether/ifWhetherwhether/if Activity 5 Circle and correct the mistake in each sentence.1.How can we find a sol

9、ution to produce sufficient food is an important topic for us to research.2.That the 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.iswe canWhatAssess your progressActivity 6 Fill

10、 in the blanks in the passage and understand how the subject clauses are used.Yuan Longping,the“father of hybrid rice”,considered himself a farmer at heart and devoted his life to millions of Chinese famers._concerned him most was _famers often had poor harvests.Therefore,he chose to study agricultu

11、re.As a researcher,_ Yuan realized was that large fields were not the solution but to expand output in the fields._ this could be done was a challenging question.Yuan firmly believed that the answer could be found in the creation of hybrid rice.Yet,_ it was possible to develop hybrid rice was in gre

12、at debate.Overcoming enormous difficulties,Yuan succeeded in developing the first hybrid rice in 1973.Whatwhat HowwhetherthatAssess your progress这份工作最吸引我的地方是有机会去旅行。这份工作最吸引我的地方是有机会去旅行。_ to the job is the chance to travel around.What attracts me most你保持冷静和理智是重要的（你保持冷静和理智是重要的（it）_ you stay calm and in

13、control.It is important that使他父母生气的是他总是熬夜看小说。（使他父母生气的是他总是熬夜看小说。（what）What annoyed his parents was that he always stayed up reading novels.最让我感到吃惊的是他居然会讲俄语。最让我感到吃惊的是他居然会讲俄语。What surprised me most was that he could speak Russian.据预测，这个冬天是自据预测，这个冬天是自1941年以来最冷的一个冬天。（年以来最冷的一个冬天。（predict)It is predicted that this winter is the coldest one since 1941.How he became a great scientist is known to us all.u主语从句三要素主语从句三要素 主语从句用主语从句用 _ 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_ 主语从句不能省略主语从句不能省略_陈陈 述述单单 数数引引 导导 词词