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1、主语从句Read and Think about these sentences1.However,what concerned him most was that farmers often had poor harvests and sometimes even had a serious shortage of food to eat.2.How this could be done was a challenging question at the time.3.However,whether it was possible to develop a hybrid of selfpol
2、linating plants such as rice was a matter of great debate.4.Today,it is estimated that about 60 per cent of domestic rice consumption in China is comprised of crops generated from Yuans hybrid strains.5.What impresses people most about Yuan Longping is his ongoing ability to fulfill his dreams1 1以上红
3、体部分在句中作以上红体部分在句中作_语。语。2 21 1句和句和5 5句中的句中的whatwhat在从句中作在从句中作_。3 33 3句中的句中的whetherwhether意为意为“_”“_”。4 44 4句中的句中的it it是形式主语，真正的主语是后面的是形式主语，真正的主语是后面的_。5 52 2句中的句中的howhow在从句中作在从句中作_。主主语是否that 引导的从句状语一.主语从句的定义在主从复合句中，充当 从句是主语从句。它是名词性从句之一，使用 句语序。二.主语从句的连接词连接词：that whether连接代词:who，whose，whom，whoever，what，wh
4、ich等连接副词：when where how why whenever等主语的陈述(1）由that,whether引导的主语从句That you are coming to London is the best news I have heard this long time.That she survived the accident is a miracle.小结：that引导的主语从句时,在从句中 充当句子成分，_实际意义,只起到连接作用,_省略。Whether they would support us was still a problem.Whether the plan wil
5、l be carried out is still unknown.Whether we go by train or by boat makes no difference.Whether引导的主语从句时,在从句中 充当句子成分，意思为_,只起到连接作用,_省略。不无不可不是否不可2）连接代词：who，whose，whom，whoever，what，which等_ _will go to the concert is still unknown.Whoever is the last to leave should turn off the lights.of them will win t
6、he game is hard to say.What concerned him most was that farmers often had poor harvests and sometimes even had a serious shortage of food to eat.some scientists have found is that their long-term use can sometimes harm both the land and peoples health.What Yuan Longping really cared about was not mo
7、ney or celebrity.What you are doesnt matter,when it comes to happiness.Whose car was stolen must be made clear.小结：连接代词引导主语从句，在句子中做 语 语 语 语。主 WhoWhat宾表定WhichWhy different crops are grow is because they put important minerals back into the ground.I will spend my summer holiday is still uncertain.How w
8、e understand things has a lot of to do with what we feel.the delayed fight will take off depends much on the weather.小结：连接副词引导主语从句，在句子中做 语。WhereWhen状（3）连接副词：when where how why whenever等三、it作形式主语当句子主语过长时,为保持句子平衡,避免头重脚轻,常把主语从句后置,而用形式主语it代替。it做形式主语时,通常有三种形式,常用于以下句型：1）It was surprising that she passed t
9、he difficult exam.It was clear that Tom refused to go to the hospital.It is obvious that you are a good boy.小结:It+be+主语从句 译为：做.是.的2）It is reported that a big earthquake hit the area.It is believed by some scientists that the long-term use can sometimes harm both the land and peoples health.It is sai
10、d that they are identical twins.小结:It+be+主语从句 译为：据.形容词过去分词3）It is a pity that he missed such an interesting film.It is good news that he has recovered.It is no wonder that he wanted to go home.小结:It+be+主语从句 译为：做.是.的名词练习题1._the earth is round is a fact.2._price will go up is certain.3._ they need are
11、 books.4._ impressed me most was that they have all suffered a lot.5._ we will do next should be decided.6._ I want to say is that you cheated me.7._ role he will play in the film hasnt been known.8._ part of the country he will travel to needs discussing.9._ will be in charge of the company is myst
12、ery.10._ we will hold a party tomorrow depends on weather.ThatThatWhatWhatWhatWhatWhatWhichWhoWhether11._ Li Bai,a great Chinese poet,was born is known to the public,but some wont accept it.12._John was late for the class has been unexplained.13.It is no wonder _your students have made such great pr
13、ogress.14.It is very important_ a student(should)learn English well.15.It is a pity _ you missed your family.16.Exactly the potato was introduced into Europe is uncertain,but it was probably around 1565.17.the couple managed to accumulate(积累)so much money in such a short time remains a mystery to th
14、e public.WhereWhythatthatthatwhenHow18._ she comes or not makes no difference.19._ I finished doing the homework in such a short time surprised them all.20.Just like some Europeans celebrate Spring Festival nowadays,its no wonder _ Chinese celebrate Christmas.21._ will be the championship of the nin
15、th season of the Voice of China has not been decided.22._ we are going to have an English test has not been decided.23._he wont go there is clear to all of us.24._the sports meet will be held depends on the weather.25.the delayed flight will take off depends much on the weather.Whether ThatthatWhoWh
16、etherWhyWhetherWhether用主语从句造句1.让我们感到惊讶的是他完成它的速度非常快（what）。2.事实是英语作为国际语言，正在广泛被接受（it is a fact that）3.问题是谁会去这个会议（who）4.哪一个队将会赢得比赛还是未知的。（which）5.这如何实现是个值得研究的问题。（how）What surprised me most was that they had finished it so quickly.It is a fact that English is being accepted as an international language.Who will go to the meeting is the problem.Which team will win the match is still unknown.How this could be done was a good question.