1、Noun clauses as the subject,Unit 4 Grammar,主语从句,2,3,1、帮助学生了解、熟悉并初步掌握名词性从句主语从句的用法。2、使学生能够找出主语从句，并动手解决主语从句的相关练习。3、学会用主语从句简单会话表达。,本课首先开始于简单句子到复合句子中对主语的认识，从学生熟悉的名词、人称代词充当主语，一步一步由浅入深过渡到句子作主语。旨在给学生有个初步认识，为下面的环节打基础。 通过小组竞赛，在已学的reading中快速找出主语从句，旨在加深学生对主语从句的认识程度，竞赛有利于培养学生的合作能力，使语法课生动活跃起来。通过不同的语法练习的呈现、讲练结合看图根
2、据对话写出主语从句及各种语法任务设置，使学生掌握主语从句的相关知识。尤其是try your luck部分更能调动学生学语法知识的气氛，提高学生解决语法知识的能力，熟悉主语从句。,preparation,What part does the underlined part serve as in each sentence? A tree has fallen across the road. You are a student. To find your way can be a problem. Smoking is bad for you. What she said is not yet
3、 known. That we shall be late is certain. It is certain that we shall be late.,主语,Lets see which group can find the sentences like the following examples in Reading on Page25-26 more quickly.Attention please:1. Four or six people in a group. 2.Try to find as many sentences like the following example
4、s as possible! 3.If your group finish the task, please put up your hand and one member should tell us all the sentences your group have found.,Group competition,Examples : (sentences served as subject) What she said is not yet known. That we shall be late is certain. It is certain that we shall be l
5、ate.,1. What it was to become was uncertain until between 4.5 and 3.8 billion years ago when the dust settled into a solid globe. 地球会变成什么样子，直到45亿至38亿年前这个云团变成固体的球状物，才确定下来。2. The earth became so violent that it was not clear whether the shape would last or not. 地球变得激烈动荡，不知道这个固体形状 是否会继续存在下去。3. What is
6、even more important is that as the earth cooled down, water began to appear on its surface. 更重要的是，随着地球的冷却，地球的表面就开始出现了水。4. It was not immediately obvious that water was to be fundamental to the development of life.水对于生命的发展会起关键作用，这一点在当时并不明显。,Read & translate,所有划线的句子都充当_.那么什么是主语从句呢？,主语,如果一个句子在复合句中充当一个主
7、语, 那么这个句子就是主语从句。,That he finished writing the composition in such a short time surprised us all.What we need are good doctors.Whom we must study for is a question of great importance.,What is subject clause?,主语从句三要素,he became a great scientist is known to us all.,Is what you told me really true?,谓语动
8、词用单数,从句用陈述语序,不能省略关联词,Notice:,What we need most are books.,How,_has not been found.,Student A: where was Thomas Edison born?Students B: I dont know. I cant find the answer in the passage.,Where he was born,_is still unknown.,Student A: who will win the English speech contest?Students B: I dont know.
9、It is hard to say.,Who will win the match,_will be welcome.,Student A: Tom, tomorrow is your birthday. Who do you invite?Students B: I will welcome everyone who comes to my party.,Whoever comes,在主语从句中, 谓语一般用单数。,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,但谓语
10、动词用单数还是复数, 不可一概而论, 而要视句子的意义而定。 What I need is money. What I need are books.,what 与that 在引导主语从句时的区别what 引导主语从句时在句时在从句中充当句子成分, 如主语、宾语、表语, 而that 则不然。 1) What you said yesterday is right.2) That she is still alive is a consolation.,为了防止句子头重脚轻，通常把形式主语it 放在主语位置，真正主语后置。,It is certain that he will win the m
11、atch. That he will win the match is certain.,2. It is true that he has made a very important discovery in chemistry. That he has made a very important discovery in chemistry is true .,3. It is very likely that they will hold a meeting. That they will hold a meeting is very likely .,1.以that 引出的主语从句,常
12、以形式主语it引导, 结构为: It is +形容词/名词/某些动词ed + that 从句。 (1) It is +形容词/名词+ that 从句，如： It is a pity/shame that 遗憾的是 It is possible that 很可能 It is unlike that 不可能 (2) It +不及物动词+ that 从句，如： It seems/appears that. 似乎 It happened that 碰巧,It + be + 过去分词+ that 从句It is said that 据说 It is known to all that 众所周知It is
13、 reported that 据报道It is believed that 人们相信It is suggested that 有人建议It must be pointed out that 必须指出,Try your luck!,Choose the pictures and finish the exercise with your group!,1. _ watch was lost is unknown.2. _ you did is right.3. _ we will go for an outing tomorrow remains unknown.4. _ we need is
14、time.5. _ will be our monitor hasnt been decided yet.,whether what who whose whatever,Use the words below to fill in the blanks.,Whether,What,Whatever,Whose,Who,back,【常见错误展示】下列各句均有一处错误，请改正并分析错误的原因。1. Light travels faster than sound is common knowledge.2. If shes coming or not doesnt matter much.,Tha
15、t,that虽无词义但引导主语从句位于句首时不能省略。,Whether,if, whether都可表示“是否”, 但if不能引导位于主句之前的主语从句，它可以引导位于主句之后带有形式主语it的主语从句。,back,You are lucky today! You dont need to do exercises!,back,3. That the professor said is of great importance.4. Where will the trees be planted has not been decided.,What,that引导主语从句时无词义。What the
16、professor said表示“教授所说的”。,将will置于trees之后。主语从句要用陈述句语序。,back,【常见错误展示】下列各句均有一处错误，请改正并分析错误的原因。,5. No matter who breaks the rule will be punished.6. When the meeting will be held still remain a question.,引导让步状语从句时二者可互换，但引导名词性从句时只能用whoever。,Whoever,主语从句表示单一概念时，谓语要用单数形式。,remains,back,【常见错误展示】下列各句均有一处错误，请改正并
17、分析错误的原因。,7. It was requested that everyone made a speech at the meeting.,在“It is requested / ordered / suggested + that从句”中，从句要用虚拟语气，即谓语用“should + 动词原形”，should可省略。,(should) make,back,【常见错误展示】下列各句均有一处错误，请改正并分析错误的原因。,Finish ex.2 in Discovering useful structures.,Group work,Discovering useful structure
18、s,1. His discovery has not yet been proved.What _.2. Do the other astronomers accept his ideas? It remains a question. Whether _.3. The first appearance of life on earth is still a mystery to scientists. How _.,has not yet been proved is his discovery,other astronomers accepts his ideas remains a qu
19、estion,life first appeared on earth is still a mystery to scientists,Ex. 2,4. Why is the earth becoming warmer? It is an important topic for research. Why _.5. Stephen Hawking at 65 experienced zero gravity during a flight. It amazed everybody.It amazed everybody _.6. Pluto is no longer considered a
20、 planet in our solar system. What a surprise! It is a surprise _.,that Stephen Hawking at 65 experienced zero gravity during a flight.,that Pluto is no longer considered a planet in our solar system,the earth is becoming warmer is an important topic for research,1. 主语从句位于句首时必须由连接词 引导。2. 主语从句后置时引导词that可省略。3. 主语从句位于句首时,不能用if 引导。4. 主语从句后置时, 可以用if引导。,Finish ex.22) Write down 5 subject clauses in your exercise book.,
