Unit3Ahealthylife-Grammar课件（人教版选修6）.ppt

due to 6. stress addicted 7.quit eventually 8. drugs manage 9. alcohol cigarettes 10. adolescents Revision Complete the passage with the suitable words and phrases in their proper forms. WWW.ZXXK.COM 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. cigarettes alcohol drugs adolescents stress due to 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. eventually addicted quit manage Grammar The use of “it” Discovering “It” It rains heavily. 2. It is 20 kilometers from Granddads house to James’. 3. It is November 11, 2005. 4. It is 9 o’clock at night. 5.Itll be lovely in the garden tonight． 6. It is bad to smoke. 7. It is likely that he will succeed. 天气 距离 日期 时间 形式主语 环境 形式主语 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. 一、it 作人称代词 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. 二、it作非人称代词 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. WWW.ZXXK.COM 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