浙江省杭州市塘栖中学高中英语必修三：Unit4P3Languagepoints教学课件.ppt

必修3 本课时主要是针对阅读材料中重点词汇、短语和句型的解释，教师可根据学生的预习情况来选择性讲解。为了引导学生自主学习，自行查找相关资料学习新单词，这里只针对部分词汇进行解释。 教师讲解时，建议采用归纳法，如尽可能多的呈现一些相关例句，或让学生从已学课文中找相应例句，引导学生试着从所观察到的语言现象中总结出词汇的意思和用法。 1. in time in time (for sth. / to do sth.) = not late The car came to a stop just in time to prevent an accident.  汽车及时停下，避免了一场车祸。 Can we get to the station in time?  我们能及时到达车站吗？ 及时；终于 We will manage to accomplish the task _______ even though it is difficult. at time    B. for time    C. in time   D. by time Choose the best answer. 2. atmosphere The shuttle Columbia will re-enter Earths atmosphere tomorrow morning. 哥伦比亚号航天飞机将在明天上午重进地 球大气层。 They left the lights down to create a comfortable atmosphere. 他们让灯光保持暗淡以创造一种舒适的气 氛。 n. 大气层；气氛 The talk is going on in a friendly ______ and hopefully an agreement will be reached. environment B. situation C. chance D. atmosphere Choose the best answer. 3. harmful adj. 有害的 These harmful chemicals will do us no good. 这些有害的化学制品对我们没有好处。 It is certain that the dirty water is harmful. 毫无疑问，这些脏水是有害的。 be harmful to 对……有害 Such films will be harmful to teenagers. 这些电影会对青少年有害。 用harm的适当形式填空，完成下 列各句。 As we all know, smoking is ________ to our health. 2. Often playing computer games will do you great ______. 3. The water in this cave is so clear that it is _________ to our health, I think. harmful harm harmless 4. lay eggs The hens are not laying well at the moment. 现在那些母鸡不爱下蛋。 lay, lie 区别 lay vt (laid, laid, laying) 放置; 搁; 铺; 下蛋 lie vi (lay, lain, lying) 躺; 平放 lie vi (lied, lied, lying) 撒谎; 说谎 下蛋 The old woman was counting the eggs ______ by the hens during the month. laid B. lied C. lay D. lain Choose the best answer. What prevented you from joining us last night? 昨晚什么事使你不能加入我们? 阻止某人做某事: 5. prevent ... from We must prevent the disease (from) spreading.  我们一定要防止疾病蔓延。 阻止; 制止 Translate the following sentences.