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1、1.The man is looking at you.2.You are a student.3.To find your way is a problem.4.Smoking is bad for you.5.What you need is a book.6.That Tom will come here excites me.7.When they will turn up is uncertain.8.It is a pity that you didnt see him.Find out the subject in the sentences.用作主语的从句叫主语从句。用作主语的
2、从句叫主语从句。引导词引导词A：连词：连词：that,whether，ifB:连接代词：连接代词：who,whose,whom,whoever,what,which等等 C:连接副词：连接副词：where,when,how,why2.有时用有时用it作形式主语，将主语从句后置作形式主语，将主语从句后置,这这样做是为了避免句子头重脚轻。样做是为了避免句子头重脚轻。It is obvious(that)he doesnt like the gift.It is a surprise that he finished the work in such a short time.It is repor
3、ted that china had sent another spaceship.It happened that he was out that day.1)It+be+名词名词+主从主从2)It+be+形容词形容词+主从主从3)It+be+动词的过去分词动词的过去分词+主从主从 (said,believed,reported,known,proved,)4)It+不及物动词不及物动词+主从主从 (seem,appear,happen)It 作形式主语的句型作形式主语的句型what vs that _ you lack is self-confidence._ the famous wil
4、l come to our school excites everyone.that:1）不作句子成分）不作句子成分&没有实际意义；没有实际意义；2）that引导的主从位于句首时，引导的主从位于句首时，that不能省略不能省略what：1）作句子成分）作句子成分 2）有具体的意义）有具体的意义WhatThat1)_is important to us is enough time.2)_we cant get seems better than _we have.3)It worries my sister _she is getting a litter fat.Whatwhat Whatt
5、hatwhether or if 1)_well go camping tomorrow depends on the weather.2)It was doubtful _Tom really saw Mary.3)_Tom really saw Mary was doubtful.主语从句位于句首，只能用主语从句位于句首，只能用whether引导；引导；但如果用但如果用it作形式主语，作形式主语，二把主从放在句末，也可以用二把主从放在句末，也可以用if引导。引导。Whetherwhether if Whether 用适当的单词填空，使下列主语从句意思用适当的单词填空，使下列主语从句意思完整
6、。完整。1._ he finished writing the composition in such a short time surprised us all.2._ we will go for an outing tomorrow remains unknown.3.It is a pity _ we wont be able to go to the south to spend our summer holidays.ThatWhether/Wherethat4._ she is coming or not doesnt matter too much.5._ he came fr
7、om still puzzles all of us.6.It happened _ I saw him yesterday.7.It does not make any difference to me _ you do.WhetherWherethatwhat8._ was responsible for the accident is not yet clear.9._ they will have the sports meet is still a question.10.It doesnt matter _ she looks like.WhoWhen/Where/Whetherw
8、hat1.Light travels faster than sound is common knowledge.2.If shes coming or not doesnt matter much.3.That the boy needs is a toy.4.What were your problems a year ago has now become mine.5.Where will the trees be planted is uncertain.ThatWhetherWhatthe trees will主语从句要用陈述句语序。主语从句要用陈述句语序。haveCorrect t
9、he mistakes6.No matter who breaks the rule will be punished.7.When and where the meeting will be held still remain a question.引导引导让步状语从句时二者可互换，让步状语从句时二者可互换，但引但引导导名词性从句时名词性从句时只能用只能用whoeverwhoever。Whoever 主语从句表示主语从句表示单一单一概念时，谓语要用概念时，谓语要用单数形式单数形式。remains7.It was requested that everyone made a speech at
10、 the meeting.在在“It is requested/ordered/suggested+that从句从句”中，从句要用中，从句要用虚拟语气，即谓语用虚拟语气，即谓语用“should+动词动词原形原形”，should可省略可省略。(should)make1.Well be late.Its certain.2.Is he coming or not？We dont know.3.When will you come back?It doesnt matter.Make sentences Make sentences Its certain.well be late.Is he co
11、ming or not？We dont know.When will you come back?It doesnt matter.Its certain that we will be late.That well be late is certain.We dont know whether he is coming or not.Whether he is coming is not known.When you will come back doesnt matter.It doesnt matter when you will come back.1.他在找什么与你无关。他在找什么与
12、你无关。Translate the sentences by using subject clause2.他喜欢这种书，这件事非常有趣。他喜欢这种书，这件事非常有趣。3.他是否能来仍然是个问题。他是否能来仍然是个问题。What he is looking for is none of your business.That he likes books of this kind is very interesting.It remains a question whether he will be able to come.5.飞机何时起飞还没有宣布。飞机何时起飞还没有宣布。4.他们哪一个是从监狱里逃跑的，仍他们哪一个是从监狱里逃跑的，仍然是个谜。然是个谜。Which of them escaped from the prison is still a mystery.When the plane is to take off has not been announced./It has not been announced when the plane is to take off.