Unit 5 Working the Land Discover Useful Structures （ppt课件） (1)-2024新人教版（2019）《高中英语》选择性必修第一册.pptx

1、Discovering Useful StructuresBy the end of the class,learners will be better able to Identify subject clauses，choose proper leading words and arrange correct word order of subject clauses，and follow the rule of Subject-Predicate Agreement(主谓一致)when using subject clauses.Use subject clauses to write

2、a paragraph about Prof.Yuan Long pings good qualities and great achievements.30101Definition定义定义0202Linking-words 连接词连接词0303Special usage 注意事项注意事项0404Exercises即时练习即时练习1.Yuan Longping is one of Chinas most famous scientists.2.He made large donations to support agricultural research.3.To develop the f

3、irst hybrid rice cost him a lot of time.4.Keeping all the people away from hunger is his lifelong pursuit.5.What he really care about was not money or celebrity.结论：主语是句子说明的人或事物，一般放在_。一个句子来充当_叫主语从句。句首句首主语主语主语从句的定义主语从句的定义在句中充当主语的从句在句中充当主语的从句有有时为了避免头重脚轻，常用时为了避免头重脚轻，常用 it it 作形式主语作形式主语71.That Yuan Longp

4、ing 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.Which one is the best to expand output is not clear.5.When Yuan would retire to a life of leisure was never mentioned.6.Where the hybrid

5、rice can be planted is a question.7.Why Yuan developed seawater rice was to feed more people.Find the linking words of subject-clause.81.That I love English is real.2.That you can travel around the world is amazing.3.Whether he will come is uncertain.4.Whether the boy could win made me curious.that

6、引导的主语引导的主语从句从句:that位于句首位于句首 无意义，无意义，不充当任何成分，不可省略。不充当任何成分，不可省略。“whether+陈述句陈述句”做主语，做主语，whether 引导的主语引导的主语从句放从句放句首，不能用句首，不能用if。有意义，。有意义，翻译成翻译成“是否是否”。91.What the refugees have gone through is beyond our imagination.2.Who would get the opportunity to travel to Beijing is unknown.3.Which student would be

7、 the volunteer is not clear.4.Whoever breaks the law will be punished.连接连接代词代词 what,who,whose,which,whoever,whatever,whichever 引导的主语从句。引导的主语从句。连接代连接代词在从句词在从句中中充当主语、宾语、定语充当主语、宾语、定语等成分，有意等成分，有意义且不可省略。义且不可省略。引导的主语从句。引导的主语从句。10 When we will leave hasnt been decided.How she keeps healthy is a secret.Why

8、he cries is not clear.Where the meeting will be held is not known.连接连接副词副词 when,where,why,how 引引导的主语从句。引引导的主语从句。连接副连接副词在从句中充当词在从句中充当状语状语，有意义且不可省略。，有意义且不可省略。通常，因为主语从句较长，为了避免句子结构头重脚轻，我们常用通常，因为主语从句较长，为了避免句子结构头重脚轻，我们常用itit作作形式主语，而把主语从句放在主句之后。要注意由形式主语，而把主语从句放在主句之后。要注意由 what,whatever,whoever 引导的主语从句一般不用形式

9、主语。引导的主语从句一般不用形式主语。eg.1.That he will attend the meeting has excited all of us.It has excited all of us that he will attend the meeting.2.Whether he comes or not doesnt matter too much.It doesnt matter too much whether/if he comes or not.3.Where I should go on a vacation is hard to decide.It is hard

10、to decide where I should go on a vacation.12(1)It+be+形容词（obvious,true,surprising,wonderful,possible,likely,certain)+that 从句(2)It+be+过去分词(said,reported,thought,expected,decided,announced,suggested等)+that从句(3)It+be+名词词组(a pity,a shame,good news,an honor,no wonder等)+that从句(4)It+动词/动词短语(seem,appear,happ

11、en,matter,turn out,occur to等)+that 从句131.It is necessary that we(should)have breakfast.2.It was suggested that we(should)put off the meeting.It is necessary/important/strange/natural等+that(should)doIt is suggested/requested/desired/ordered等+that(should)do接虚拟语气的主语从句:1.很明显他输掉了比赛。2.据说学校下周讲举行运动会。3.能被邀请在

12、这做演讲是一件荣幸的事。4.碰巧我昨天在路上碰到了我的班主任（it happens that.)It is obvious that he lost the game.It is said that there will be a sports meeting in our school.It is an honor that I am invited to give a speech here.It happened that I came across my headteacher yesterday.16主谓一致原则主谓一致原则1.Where Li Bai,a great Chinese

13、 poet,was born _(be)known to public,but some wont accept it.(2015江苏卷)2.When the person was murdered and why he was murdered _(be)still unknown now.3.It _(be)still not exactly sure to scientists how genes influence aging,but they believe that they do.(2016四川卷)4.What he needs _(be)some books.5.I first

14、 have to remove all the rotten parts,and sometimes,what is left _(be)not enough for my design.(2020河南天一大联考)isareareisisRule 2:Rule 2:formsforms+主句谓语主句谓语verbverb单个主从多个主从并列It作形式主语What引导主从单数复数单数表/宾语决定171.How much did I pay for the violin is a secret.2.How much I paid for the violin is a secret.3.It isn

15、t clear whether he will come or not.4.It isnt clear whether will he come or not.5.Where we will have a picnic should be discussed.6.Where will we have a picnic should be discussed.7.How we go for a picnic should be discussed.8.How do we go for a picnic should be discussed.主语从句的从句部分要用主语从句的从句部分要用_语序语序

16、 17陈述句what what 与与 that that在引导主语从句时的区别在引导主语从句时的区别1)_ you said yesterday is right.2)_ she is still alive is exciting.3)_ he lost the bike worried him a lot.4)_ he lost yesterday is his bike.WhatThatThatWhatwhat 既引导从句，又在从句中充当主语、宾语或表语，而that 只引导从句，不在从句中充当成分。19主语从句和强调句的区分主语从句和强调句的区分1.It is believed that

17、 beauty comes from within.(2015北京卷)2.It was the times that produce their heroes.3.It was when we were returning home that I realized what a good feeling it was to have helped someone in trouble.(2015湖南卷)4.It is often the case that anything is possible for those who hang on to hope.(2016江苏卷)主语从句主语从句强

18、调句紧紧抓住紧紧抓住强强强强强强强强强调句主语从句判断方法：去掉It is/was that 之后，若 句子结构仍然完整，则为强调句，it isthat中间的部分为被强调的部分；句子结构混乱不完整，则it为形式主语，真正的主语是由that引导的从句。Summary在句子中充当在句子中充当主语主语成分的从句叫做成分的从句叫做主语从句主语从句。主语从句的位置：在谓语动词之前在句末，前有形式宾语it主语从句的连接词：连接代词who,what,which,whom,whose连接副词when,where,how,why从属连词that,whether,if Practice1.It is obviou

19、s to the students_they should get well prepared for the future.2._surprised him most was that he had received many gifts.3.We all think highly of your plan,but it is still under discussion_ we should carry it out right now.4._I want to tell you is the deep love and respect I have for my parent.5._ma

20、kes our school famous is_more than 90%of the students have been admitted to universities.thatWhatwhetherwhatWhatthat语法填空。(1)Whether it will do us harm or good _(remain)to be seen.(2)_ is well-known that Chinese people are not only hard-working but friendly.(3)What we cant get _(seem)better than _ we have.(4)_ it was possible to develop a hybrid of self-pollinating _(plant)such as rice was a matter of great debate.remainsItseemswhatWhetherplantsPracticeDiscovering Useful Structures