语法：
1.过去完成时
1）…both radio and television had be come established means of transmitting sounds and pictures.
2. 非限定性定语从句
1）…radio waves， which are then sent from a station on earth to an orbiting satellite.
2）…back to earth， where another station picks them up and changes them back into television signals.
3）The combination of satellites，which transmit information，computers，which store information，and television，which displays information，will change every home into an education and entertainment center.
2. 宾语从句
1）We must remember that technology alone is not the answer.
2）The satellite also demonstrated how it could provide help to people living in isolated areas…。
3. 注意such as，as well as，as的用法
1）In order to transmit an event such as the Olympics via satellite， …
2）…printed materials such as books and magazines.
3）…as well as get any information they need， …
4）As one telecommunication expert days， …
Text B What People Don't Know about Air
短语表达
1. without
We couldn't have finished the work so soon without your help.
2. adv. + past participle
It is widely known that the earth goes around the sun.
It is generally believed that the earth is getting hotter.
3. where
Where there is a will，there is a way.
4. be forced to
They were forced to work 14 hours a day.
5. shelter v.& n.
Mother tried to shelter her from the blow of the tragic news.
You have to find shelter from the blazing sun.
6. protect from
She had his umbrella to protect her from the sun.
7. deadly adj.
A drop of this poison might be deadly to man.
8. burst
As he braked a tire burst.
Everybody in the room burst out laughing.
The little girl burst into tears.
9. rest upon
His arm rested upon the table.
The task rested upon my shoulder.
His eyes rested upon a strange object.
10. gaze at
He was standing at the window， gazing at the street.
11. not…until
He didn't go out to play until he finished his homework.
12. in the meantime
13. pay attention to
Please pay more attention to your spelling next time.
14. add to
If you praise others more often， you can add great happiness to their life.
What he said just now added to my confusion.
本课主要语法点：动词不定式
在句子中，不能作谓语，而是担任其他语法功能的动词，叫做非谓语动词。非谓语动词包括动词不定式，分词和动名词。
1.不定式的语法功能：不定式具有名词、形容词和副词的特征，因此他在句中可以作主语、表语、宾语、宾补、定语和状语。
1）作主语
如：To speak English well is not an easy job.说好英语不是一件容易的事情。
动词不定式作主语时，为了保持句子的平衡，往往用it作形式主语，而把不定式短语放在谓语动词之后。
如：It is important to master English grammar.掌握英语的语法是重要的。
2）作表语
如：Our plan is to set up another middle school for the children.我们的计划是为孩子们再建一所学校。
His ambition is to become a successful scientist.他的抱负是要成为一名成功的科学家。
3）作宾语
如：They decided to change their mind. 他们决定改变主意。
I can't afford to live in a detached house.我住不起独门独院的房子。
注：a)不定式短语作宾语时，如果还有宾语补足语，往往把不定式短语放在宾语补足语后面，而用it作形式宾语。
如：I find it interesting to study English.我觉得学英语很有趣。
b)动词不定式也可以作某些形容词短语的宾语。这些形容词有：ready, eager, anxious, able, sure, glad, afraid, pleased等。
如：They are anxious to learn how to swim.他们渴望学会游泳。
c)动词不定式一般不作介词的宾语，但是不定式之前如有疑问词，就可以作介词的宾语。
如：Professor Wang gave some advice on how to learn a foreign language.王教授给了一些如何学习外语的建议。
d) 有些动词可以跟疑问词+不定式作宾语
如：I don't know what to do next.我不知道下一步该做什么。
4）作宾语补足语
动词不定式可用作复合宾语中的宾语补足语。
如：My English teacher advised me to buy a better dictionary. 我的英语老师建议我买一本好的词典。
注：在feel, hear, listen to, look at, observe, see, watch, make, have, let等动词后面，复合宾语中动词不定式的标记to通常被省略。动词help后面的to可以省略也可以保留。
如：I saw her enter the cinema.我看见她进了电影院。
We must have someone repair the computer.我们必须让人来修这台电脑。
He helps the little girl (to) finish her homework everyday.他每天都帮助这个小女孩完成她的家庭作业。
5）作定语
动词不定式作定语放在所修饰的名词或代词之后。
如：Her desire to win was apparent.她的求胜愿望显而易见。
She was the only one to get a scholarship.她是唯一得到奖学金的人。
注：a)作定语的不定式如果是不及物动词，或者不定式所修饰的名词或代词是不定式动作的地点、工具， 不定式后面须加相应的介词。
如：She is looking for a room to live in.她在寻找一间房子住。（live是不及物动词，后面加相应的介词）
I need a pen to write with.我需要一支笔写字。（pen是write动作的工具，在write后面加介词）
但是如果不定式修饰的名词是time, place或way, 不定式后面的介词习惯上省去。
如：He had no place to live.他没有居住的地方。
That's no way to talk.不应这样谈话。
b)在there+be这一句型中，动词不定式作定语时可能出现动词不定式的被动式，其含义和主动式基本相同。
如：There are many books to read/ to be read.有好多书要读。
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