新牛津深圳版初中英语(七年级下)Chapter5幻灯片.ppt

turn off 关闭 词语用法：关掉电源类(电灯;水龙头） 如： Turn off the light when you don’t use the electric. 反义词：turn on 打开 拓展: turn up 调大 turn down 调小 voice 嗓音；声音 词语辨析： voice：指说话声；歌唱声；鸟叫声 sound: 指主要指物体发出的声音 noise：指噪音；不好听的声音 waste 浪费 用作动词时，表示浪费，注意以下句型和结构： （1).waste time (money）on sth 表示在方面浪费时间（金钱）。 Don’t waste any more time on it. (2).waste time (money) in doing sth. 表示浪费时间（金钱）做某事。 We wasted a whole afternoon in trying to repair the car. drop 滴；降落 (1)、作名词，水滴。如： I’m a drop of water. (2)、作动词，降落，掉下。 He dropped into the river. 词语扩展： drop behind 落后于 drop by 顺便探望 drop in on sb 看望、拜访某人 add 增加 词语用法：常与介词to连用，即 add...to...表示把加到中去。 If you add 4 to 6,you get 10. 词汇拓展： add...up 表示：把加起来 add up to 表示：加起来总和为 pollute 弄脏;污染 词语拓展： polluted 被污染的 pollution 污染 词语搭配： cause pollution 造成污染 noise pollution 噪声污染 valuable a. = precious 有价值的 a valuable collections of paintings 一批很有价值的画 valuable advice / help / information 宝贵的意见 / 帮助/ 信息 valuables n. 贵重物品 value n. 价值 Talk time Homework A lot of students have lunch at school. Do a survey about their lunch. Then use the graphs and charts. Draw bar charts, line graphs or pie charts showing how the students like their lunch at school. And write a letter to school to express some advice. Why do we need water? Speak up Work in groups of 5. S1 is in charge of the water in the city. The other students must explain how they use water. Useful expressions: We need water for washing / drinking… It is very important because… If we do not have water, …will… What can we do to save water? Don’t wash…under running taps. Fix Turn dripping taps off. Use a mug for brushing teeth. Don’t water plants too much Take a shower rather than a bath. Don’t waste for playing water. A A A B C A Using graphs and charts A line graph A bar chart A pie chart A flow chart Making flow charts: SHENZHEN’S WATER travels in pipes under the streets comes out of tap run