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【名校课件】高中英语选修六《Unit3Ahealthylife-Grammar》课件(人教版)吉林长春五中.ppt
due to 6. stress
addicted 7.quit
eventually 8. drugs
manage 9. alcohol
cigarettes 10. adolescents; Smoking __________, drinking _______ or taking other_______
produce many harmful effects and have no real benefits. So why do ___________do it? Some begin because they believe it makes them look cool. Others think it will help with _______. In their life possibly ________ pressure from their parents or teachers.; Some just want to see what it is like. What they don’t realize is that they will get into the habit and ________ become ____________. It will then be difficult to ______the habit. A few people ________to quit easily but for many it is a very painful process. Of course, the best way to deal with these drugs is not to start in the first place.;Grammar;Discovering “It”;1. it的最基本用法是作代词,主要指刚提到的事物,以避免重复:
Xi’an is?a?beautiful?city, isn’t?it?
2. 也可以指动物或婴儿(未知性别的婴儿或孩子):
Is this your dog?No, it isn’t.;it有时并不指具体的东西,而泛指天气、时间、日期、距离、价值、度量、温度、环境等,称为非人称的it:
指天气:
It is a lovely day, isn’t?it?
It is a bit windy.2. 指时间:
It was nearly midnight when she came back.
3. 指环境:
It was very quiet in?the?café.
4. 指距离:
It is half an hour’s?walk?to the city centre from my home.;5. 指日期:
--Whats the date today?
--Its May 1, 2007.
6. 指季节:
It is summer now.
7. 指度量:
It is about 5 kilograms.
8. 指价值:
----Whats the cost of the T-shirt?
----It is 150 yuan.;替代作主语的从句、动词不定式、动名词,而把真正作主语的从句、动词不定式、动名词置于句尾。;(1)It be adj.(for sb.)to do sth.
此处adj. 通常为描述事件的形容词:easy,difficult,hard,necessary,unnecessary,possible,impossible,likely,unlikely,right,wrong,important,unimportant,legal,illegal,well-mannered,ill-mannered,polite,impolite,clear,obvious,certain,suitable,proper,fit,useful,useless,dangerous…
It is illegal(for a teenager)to drive a car without a license. ;(2)It be adj. of sb. to do sth.
此处adj. 通常为描述人的形容词:kind,unkind,nice,rude,cruel,considerate,thoughtful,thoughtless,careful,careless,silly,foolish,stupi
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