单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,Discovering Useful Structures,P53,Unit 5 Working the Land,新,人教选择性必修,Book 1,Discovering Useful Structures,1,找出下列句子中的主语。,1.Why she didnt show up remains a puzzle.,2.What some scientists have found is that,their long-term use can sometimes harm,both the land and peoples health.,3.It is believed by some scientists that the,long-term use can sometimes harm both,the land and peoples health.,找出下列句子中的主语。1.Why she didnt s,2,What are the functions of the noun clauses italicised?,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.,It surprised the whole world,that Yuan Longping had realised his dream of developing seawater rice,.,as,Subject,What are the functions of the,3,Subject Clauses,主语从句,在英语中，有的从句在复合句中的作用,相当于名词，称作名词性从句。复合句,中用作主语的从句叫作,主语从句,。,为了避免主语显得过长，尤其是陈述句,作主语从句时，可以用 it 作句子的形式,主语，把主语从句移到句子的末尾。,Subject Clauses在英语中，有的从句在复合句中的,4,引导主语从句的关联词有三类：,1),从属连词,that,例,:,That,they were true sisters was clear from,the facial resemblance between them.,很明显,她们的确是亲姐妹,她们的脸,型很相似。,例,:,Whether,hell come here isnt clear.,他是否会来这里还不清楚。,2)从属连词whether,引导主语从句的关联词有三类：1)从属连词that例:Th,5,例,:,What,she did is not yet known.,她干了什么尚不清楚。,例,:,How,this happened is not clear to anyone.,这事怎样发生的,谁也不清楚。,3)连接代词who,whom,whose,what,which,whoever,whatever,whichever；连接副词,where,when,how,why。,引导主语从句的关联词有三类：,例:What she did is not ye,6,How,he became a great scientist,is,known to us all.,Is,what,you told me,really true?,Notice:,What we need most,are,books.,主语从句三要素,从句用陈述语序,谓语动词一般用单数,不能省略关联词,How he became a great scientis,7,无论他说什么都不重要。,Whatever he,says,is of no importance.,无论谁说这话都不对。,Whoever,says,that is wrong,Tip,：,在主语从句中,谓语一般用单数。,Tip：,what,与,that,在引导主语从句时的区别：,what 引导主语从句时在从句中充当句子成分,如主语、宾语、表语,而that 则不然。,What,you said yesterday,is right,.,That,she is still alive,is a consolation,.,无论他说什么都不重要。Tip：在主语从句中,谓语一般用,8,引导主语,同位语,表语从句的连词,不可省略,;,it,作形式宾语的宾语从句,;,并列宾语从句中,后面的从句引导词。,Tip,：,不可省略的连词：,That,she was chosen made us very happy.,We heard the news,that,our team had won.,The reason is,that,he is too careless.,I think it necessary,that,you should read aloud.,He told,(that),his father had died and that he had to make a living by himself.,主语从句,同位语从句,表语从句,it,作形式宾语的宾语从句,并列宾语从句,引导主语,同位语,表语从句的连词不可省略;Tip：不可,9,用it 作形式主语的结构,(1)It is,名词,从句,.,It is a fact that,事实是,It is an honor that,非常荣幸,It is common knowledge that,是常识,(2)It is,形容词,从句,.,It is natural that,很自然,It is strange that,奇怪的是,用it 作形式主语的结构(1)It is 名词 从,10,(3)It is,不及物动词,从句,.,It seems that,似乎,It happened that,碰巧,It appears that,似乎,(4)It,过去分词,从句,.,It is reported that,据报道,It has been proved that,已证实,It is said that,据说,用it 作形式主语的结构,(3)It is 不及物动词 从句.用it 作形式,11,Match the sentence parts.,1,_,remains an,unanswered question.,2,_,is an important topic,for us to research.,3,_,is that these,chemicals may even cause,cancer.,4,_,these vegetables can,even be planted without any,soil through this new,technology.,5,_,is the reason why,some people prefer to live in,the country rather than in,the city.,A,What worries many,people,B,That the lifestyle is,slower and healthier,C,How we can find a,suitable solution to,produce sufficient,food while keeping the,environment safe,D,When these wheat,farmers will join,this pilot experiment,E,It amazed all of us that,Translate the completed sentences into Chinese.,Match the sentence parts.1 _,12,1 When these wheat farmers will join this pilot,experiment remains an unanswered,question.,这些小麦农户什么时候会加入预试验仍然不,得而知。,2,How we can find a suitable solution to,produce sufficient food while keeping the,environment safe is an important topic for,us to research.,如何能够找到一个合适的解决办法，在保证,环境安全的同时，生产足够的粮食，是一个,需要我们研究的重要课题。,1 When these wheat farmers wil,13,3,What worries many people is that these,chemicals may even cause cancer.,令很多人担心的是，这些化学制品甚至可能,导致癌症。,4,It amazed all of us that these vegetables,can even be planted without any soil,through this new technology.,令我们所有人惊讶的是，通过这种新技术，,可以无土栽培这些蔬菜。,5,That the lifestyle is slower and healthier is,the reason why some people prefer to live,in the country rather than in the city.,有些人更喜欢住在乡下而非城市的原因是前,者生活节奏更慢、生活方式更健康。,3 What worries many people is,14,Read the passage and underline all the subject clauses.,Grandma has been complaining about the vegetables sold in the supermarket,which have been grown using chemical fertilisers.To her,that they look beautiful on the outsideis obvious.However,what she is unhappy aboutis the 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 retirementis an important decision for them.Whether they can live a healthy lifeis the first thing they are considering.So they have made up their minds to move to the countryside,where they can live a green life.,Read the passage and underline,15,Have a discussion and prepare a presentation.,What qualities do you think,make a person like Yuan Long