【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

【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

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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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