1、lesson3 Clean Machines 学案 要点一览 ： 主要词 汇 petrol, gas, solar, racer, sunlight, kindergarten, chapter, impression, reliable, golf, appreciate, essay, shopping 主要短 语 so far, take place, all the time, find out 主要语 法 现在完成时和现在完成进行时 要点详解 1. so far 到目前为止，迄今为止 What do you think of the show so far? 到目前为止你觉得这场演出
2、怎么样？ Detective are so far at a loss to explain the reason fo r his death. 至今侦探对他的死因仍茫然不解。 2. take place 发生，举行 A concert will soon take place. 即将举行一场音乐会。 Great changes have taken place since 1976. 1976 以来发生了巨大的变化。 拓展： take down 写下，拿下来 take up 占，占地方 take turns 轮流 take to 喜欢，染上 take on 接受，雇佣 take off 起
3、飞，脱掉 take for 错当作 take after 模仿，长得像 3. all the time 一直，始终 Air pollution is getting worse all the time. 空气污染越来越严重。 拓展： ahead of time 提前 at the time 在那时，在那段时 间 at on e time 从前，一度 at a time 一次，逐 一 at times 间或，有时 in time 迟早，及时 from time to time 不时 in no time 立刻，很快 on time 准时 练习： 翻译句子 1. 科学家们正在做一项迄今为止没人做
4、过的实验。 2会议即将举行 3他已经 习惯一直在外面吃饭了 4我们迟早会查明事情的真相 5他跟他的新同学相处得很好 Keys: 1. The scientists are doing experiments no one has so far attempted. 2. The meeting will take place soon. 3. He is used to eatin g out all the time. 4. We shall find out the truth early or late. 5. He gets on well with his new classmates.
