九级Unit13 SectionA课件1(1a-2d).ppt

Factories produce too much dangerous smoke. Factories pour dangerous gases into the air. The traffic produces too many fumes. Some people smoke in public places. Help save the earth 2. cut down, 意为减少； 是“动词+副词”结构的短语，后面所带的宾语为名词时，宾语可以位于down的前面或后面；为代词时只能位于down前面。 Youd better cut the article down to about 2000 words. cut 后接off, into,up, in 的不同： Check if you know these phrases. 公共场所 把…变成 减少空气污染 乘公共汽车或地铁 代替/而不是开车 骑自行车 骑自行车的好处 把垃圾扔进垃圾箱 对…有影响 通向美好的未来 解决问题 throw away turn …into cut down air pollution take the bus or subway instead of driving Ride a bike the advantages of bike riding throw rubbish in the cans make a difference to sb lead to a better future solve a/the problem 1.This is turning beautiful places into ugly ones. turn… into… 把……变成…… e.g. The icy rain seemed like to turn into snow. 渐渐地冻雨又变成雪花的模样。 become 多指身份，职位等的变化,它强调变 化过程已经完成，后面可以接名词或者形容词。 He becomes a teacher. (2) get多用于口语，表示一种变化过程,强调的 是“渐渐变化”后常接形容词的比较级形式。 In winter the days get shorter.冬天白天渐渐变短。 (3) turn 指的是在颜色和性质等方面与以前的完全不 同，强调变化的结果。 leaves turned brown in the mountains. 山里的树叶已经变成了棕色。 cut off 切断；切除 cut into 把...切成... cut up 切碎 cut in 插队 3. There are other advantages of bike riding. advantage作名词，意为“有利条件,优点,优势”反义词为disadvantage。 如：He had the advantage of a good education. 他具备受过良好教育的优势。 What is the advantage of using nuclear power? 使用核能有何好处? advantage还可作及物动词，意为“有利于；使处于优势”。 如：It would advantage him to go abroad. 出国会对他有好处。 It would advantage you to work hard. 努力工作对你会有益。 4. It’s good for health and it doesn’t cost anything! be good for“有益于；适于”后接名词或动词-ing e.g. Do it up. Itll be good for you. 把它喝完，它对你有益。 cost v. 花费；指花费金钱，主语通常是物。cost的过去式和过去分词均为cost。 e.g. The new shirt cost Mr Wang 200 yuan. 王先生花了200元买了新衬衫。 take, spend, pay cost take多表示花费时间， 常用于It takes sb. some time to do sth.句型中 e.g. It usually takes me 40 minutes to cook the dinner. 2) spend多表