高中英语人教版必修三Unit4 Astronomy：the science of the stars Grammar主语从句 课件（20张）

课件20张PPT。Unit 4 Astronomy:
the science of the starsGrammar: The subject clauseWord-consolidation-II (2m)2.Complete this passage with some of the above words.
My friend Li Yanping was really very interested in ___________.he liked to watch changes in the moon,the only natural satellite of the earth through his telescope. One evening he thought he saw a huge comet ________as it hit the moon. The ________of the moon produced a lot of dust that became _______like a large ball. It seemed as if it would multiply and become a new _______.Li Yanping thought he was seeing the ______________of the universe until he noticed some dirt on his telescope!he was very disappointed.astronomyexplodesurfacesolidplanetdevelopment energetic violent gentle patient angry cruel terrible calm relaxing shocked harmful kind friendly jealous Put these words into the more suitable of the two boxes. Ex. 3 P.28energeticviolentangrycruelterribleshockedharmfuljealousgentlepatientcalmrelaxingkindfriendly Ex.4 1-4 DBCBReview the passage “how life began on the earth”
and translate the following sentences.谁也不知道地球会有别于其他行星.
这就是地球之独有特性的初次显现.
许多人认为这对生命的起源特别重要.
没有人懂得这些植物就是许多变化的开始.
Nobody knew that it was going to be different from
other planets.This is how the earth began to show it special qualities.Many people think that this was important for the beginning of life.Nobody understood that these plants were the
starts of many changes. Grammar 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. “How do you do?” is a greeting.
What she said is not yet known.
That we shall be late is certain.
It is certain that we shall be late.
We can see from these sentences that a sentence serves as subject, so we call it Subject Clause.What?she?did?is?not?yet?known.??Whoever?comes?is?welcome.??Whichever you want is yours.
When he will be back depends on the weather.
Where we live doesn’t matter.
How the pyramids were built was still a mystery.
That price will go up is certain.
That they are badly in need of help is quite clear.
Whether they will sell the house is not yet decided.
引导主语从句的连接词有：
连词that, whether；
连接代词who, whoever, what, whatever,和which；
连接副词when, whenever , where, how和why。Please do Ex1 on P27 (Ex book A) 注意: 有时为了使句子结构平衡, 避免 “头重脚轻”, 常用 it 作形式主语, 而把从句放在后面。 例如:
　　It is a pity that she has made such a mistake.
她犯了这样一个错误, 真是遗憾。Can you rewrite the following sentences.
1.That the earth turns around the sun is known to all.
2. That price will go up is certain.
3. That they are badly in need of help is quite clear. It is known to all that the earth turns around the sun.It is certain that price will go up .It is quite clear that they are badly in
need of help.这样就构成了下面一些常用句型:
1) It is + adj. / n. +从句
　 It is a pity/shame that... 遗憾的是……
　 It is possible that... 很可能……
　 It is unlikely that... 不可能……
2) It +不及物动词+从句
　 It seems/appears that... 似乎……
　 It happened that... 碰巧…… 　3) It + be +过去分词+从句
　　It is said that... 据说……
　　It is known to all that...
众所周知……
　　It is reported that... 据报道……
　　It is believed that...
据信……;人们相信……
　　It is suggested that... 有人建议…… It must be pointed out that...
必须指出……
It has been proved that... 已证明…….
如: It is believed that at least a score of buildings were damaged or destroyed.
据信, 至少有二十座楼房遭到破坏或彻底毁掉。It has been decided that the exhibition
will not open on Sundays.1.Where shall we spend the holiday isn’t decided.2.Your have made a mistake is a fact.3.That is certain that we can win.4.No matter who leaves the room last ought to

turn off the lights.5.It is important that a student learns a foreign language.we shallThat you haveIt isWhoevershould learn改错练习Ex. Ⅳ on P29 (ExbooKA) 5) . 用于It is important / natural / necessary / impossible that...句型中, 主语从句应使用虚拟语气, 谓语动词用“should + 动词原形”的形式, should有时有感彩。 1. _____ you don’t like him is none of my business.
2. _____ he said at the meeting astonished everybody present
3. ________ the 2000 Olympic Games will be held in Beijing is not known yet.
4. ________ we’ll go camping tomorrow depends on the weather.
5. ________ leaves the room last ought to turn off the lights. ThatWhatWhetherWhetherWhoever 6. ___ is a fact that English is being accepted as an international language.
7.It worried her a bit ____ her hair was turning grey.
8. The Foreign Minister said, “__ is our hope that the two sides will work towards peace.”9. After Yang Liwei succeeded in circling the earth, ____ our astronauts desire to do is walk in space. ItthatItwhatPair work: Please use the Subject Clause to describe your mother with your partner.
Suggested structures:
What my mother likes is ___________.
What my mother doesn’t like is ________.
Why my mother would be happy is _____.
Who my mother goes to the supermarket with is________.
How my mother cooks the dinner is______.
…………Homework1.Finish ExⅡ(2.4.5); ExⅢ on P 27.28
(exercise book A).
2.Finish the exercises on the paper.
3. Preview “ A visit to the moon”P30
4. 听写 “planet” to “disappointed”