1、Unit 4 Astronomy:the science of the starsLearning about Language语法精讲探究学习主语从句【情境探究】观察上面对话,根据下面句子的语境,试着在空白处填入适当的连词。1._ you will win the medal seems unlikely.你想获得奖牌看起来是不可能的。2._ she is coming or not doesnt matter too much.她来不来都无关紧要。3._ I want to know is this.我想知道的就是这事。4._ the plane is to take off has no
2、t been announced.飞机何时起飞还没有宣布。ThatWhetherWhatWhen【要义详析】一、主语从句的定义在主从复合句中,充当主语的从句,叫主语从句。二、引导主语从句的连接词 引导主语从句的连接词有三类:从属连词、连接代词和连接副词。1.连接词that和whether。(1)that引导的主语从句。*That you can come and join us in the Traditional Cultural Festival is really a great honor for us.你能来和我们一起参加传统文化节对我们来说是莫大的荣幸。(2)whether引导的主
3、语从句。*(2020江苏高考)It is not a problem whether we can win the battle;its just a matter of time.我们能否打赢这场战斗不是问题;这只是时间问题。【名师点津】(1)that在名词性从句中不充当任何成分,无词义,只起连接作用。(2)whether在从句中不充当任何成分,起连接作用,意为“是否”,不可省略。【知识延伸】(1)在引导主语从句、表语从句、同位语从句时一般用whether不用if。*Whether it is true remains a question.那是不是真的还是个问题。(2)whether引导主
4、语从句放在主句之后时可用if来代替。*It is unclear whether/if he likes the present.他是不是喜欢那份礼物还不清楚。【即学活用】(1)用适当的连接词填空。It is uncertain _ he will leave for Beijing tomorrow._ parents are willing to do their best to give us as much as they can is quite sure._ we will go for an outing tomorrow remains unknown.if/whetherTh
5、atWhether(2)句型转换。Young girls at your age hope to look beautiful,which is natural.(用主语从句改写句子)_That young girls at your age hope to look beautiful is natural.2.连接代词引导的主语从句。连接代词引导主语从句,在从句中可以作主语、宾语、表语或定语。常见的连接代词有:who,whose,whom,what,which,whoever,whomever,whatever,whichever等。*What China has achieved in
6、the past 70 years did not come easily.中国在过去70年里所取得的成就并不容易。*Whoever shows great interest in cycling can participate in the competition.所有对骑行感兴趣的人都可以参加比赛。【即学活用】用适当的连接词填空。(1)_ you cant miss is the Hand-copied Newspaper Competition on April 4.(2)_ part of the country he will travel to needs discussing.(
7、3)_ I want to say is that exercise is as useful and important as your study.(4)_ committed the crime should be severely punished.WhatWhichWhatWhoever3.连接副词引导的主语从句。连接副词引导主语从句并在从句中作状语,表示时间、地点、方式、原因等。连接副词有when,where,why,how等。*When we will hold the class meeting will be decided soon.我们什么时候开班会很快就会决定。【名师点
8、津】主语从句中连接词的选择技巧(1)根据连接词在从句中所作的语法成分。(2)根据连接词在从句中的意义。【即学活用】用适当的连接词填空。(1)_ the project is going depends on both of government and the workers.(2)_ Li Bai,a great Chinese poet,was born is known to the public,but some wont accept it.(3)_ hell be back depends much on the weather.(4)_ he was absent from th
9、e meeting remains a mystery.HowWhereWhenWhy4.主语从句与形式主语it。有时为了考虑句子平衡,通常在含有主语从句的复合句中使用形式主语it,而将真正的主语从句移至句末。常见的用形式主语it的主语从句结构有:(1)It be+名词词组+主语从句常用于这种句型的名词词组有:a pity,a shame,a fact,an honour,a wonder,no wonder等。*Its a shame that I forget our appointment completely!真惭愧,我完全忘了我们的约定!(2)It be+形容词+主语从句(2018江
10、苏高考)Its strange that he should have taken the books without the owners permission.真奇怪,他居然没有得到主人的允许就把书拿走了。(3)It be+过去分词+主语从句*(2018全国卷)It is believed that the movie will be not only meaningful but also interesting.据说,这部电影不仅有意义,而且很有趣。(4)It+不及物动词(happen,seem,appear,etc.)+主语从句*It seemed that many animals
11、 kept in the zoo were not being treated well.似乎很多圈养在动物园里的动物没有得到好的对待。(5)It+及物动词+宾语+that从句*It surprised me that our parents wouldnt like to accept new things.让我吃惊的是我们的父母不愿意接受新事物。【知识延伸】1.从句要用陈述语序*What I am telling you is mere impressions.我和你说的都不过是一些印象而已。2.主语从句的主谓一致如果由and连接两个或两个以上的主语从句作主语,谓语动词用复数;由两个或多个
12、连接词引导一个主语从句时,谓语动词用单数。*When they will start and where they will go have not been decided yet.他们将在什么时候动身以及要去哪里还没定下来。*When and where the meeting will be held has not been decided.会议将在什么时候以及在哪里举行还没定下来。【即学活用】用适当的连接词填空。(1)It is generally believed _ China is the largest mobile payment market.(2)It remains
13、to be seen _ they can talk him over.(3)Its a great pity _ I cant go with you as Ive already seen it.(4)It occurred to me _ I could make a special gift for my grandmother thatwhetherthatthat课时检测素养达标.用适当的连接词填空1._ worries us a lot is some drivers bad qualities.2.It is such a good opportunity _ you shal
14、l never miss it.3._ Tom will win the computer competition remains a secret till next Monday.4._ these students did is against the spirit of eco-travel.5._ we will have the meeting hasnt been decided yet.Maybe it will be held in the hall.WhatthatWhetherWhatWhere6._ made me excited was the cross talk,
15、filled with humour and cultural stories.7._ well go camping tomorrow or not depends on the weather.8.It is required _ we should experience a job to know about the differences between society and schools.9._ gets home first starts cooking the supper.10._ I want to say is that every one of us lives in
16、 a grateful world.WhatWhetherthatWhoeverWhat.单句改错1.What is known to all that English is the most widely used language in the world.()2.It is reported all the snow events of the 2022 Winter Olympic Games will take place in Zhangjiakou.()3.If the plan will be carried out is unknown.()4.It happens my b
17、irthday is approaching.()5.Who comes to the party will receive a present.()What改为It或all后加isreported后加thatIf改为Whetherhappens后加thatWho改为Whoever6.If my parents will be happy at this exam result is still unknown.()7.That we love most is the time we enjoy the full moon together.()8.Whom has helped to sav
18、e the drowning girl is worth praising.()If改为WhetherThat改为WhatWhom改为Whoever9.That we need to do is to plant more trees and flowers to beautify the environment.()10.That she comes or not makes no difference.()That改为WhatThat改为Whether【语法主题应用】请使用恰当的主语从句和本单元的重点语块作一个长假后开学第一天的感悟小结刚刚度过一个长假这个事算不上欢喜或忧郁。关键是,从今天开始,如何规划好我的日常学习与生活才是我要考虑的。时光飞逝,以至于我们都觉得每天还未收获什么便结束了。很明显的是,科技发展速度太快。因此,我们得考虑更高效的学习策略。只有这样,我们才能取得我们想要的成功。将来要做什么,怎么做等,好多事都掌握在我们自己的手中。加油!
