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1、Unit 4 Toic 3 What do you know about Mars？ Section A【学目标】1.学含有情态动词的被动语态；2.谈论外星人以及太空生活，学表达可能和不可能的功能用语。【预】一在文中找到并划出下面的短语 1.生活在火星 2.太空生活3乘飞船旅行4.在地球5.将会有6.将能够 7真有意思！8.(梦想)实现 9为了了解人类文化10我亲眼见到他们11.观看这样的电影12做科学研究 13.迫不及待做某事14.造纸【探究案】在文中划出下面的句子并分析 1.We will be able to do anything that can be done on earth.
2、思考：that can be done on earth是从句，修饰先行词点拨：can be done - 能够/可以被做(带有情态动词的被动语态) 练：a.这些树明天必须被栽种。These trees tomorrow.b.下课后应该擦黑板。The blackboard after class.2. They are reading information on the Internet in order to learn about human culture. 点拨：in order to (do) 为了 (后接目的状语)，否定形式 in order not to (do)链接：so t
3、hat - 为了 (后接目的状语从句)练： 1.为了通过考试，他每天学十多个小时。 fail the exam, he studied every day. 2.为了能赶上早班车今天早上他起床很早。He early he the early bus this morning.3.I dont think aliens can be found in sace. 点拨: 主语(第一人称)+think/suose/believe/imagine/exect，后面宾语从句中的否定词not要前移到主句，即 注意：这种含有否定前移复合句的反意疑问句部分要与从句一致 我认为明天不会下雨，是不是？I it
4、tomorrow, ?4.I wont believe there are aliens until I see them with my own eyes. 点拨: notuntil直到才(until引导了时间状语从句)，要遵循主将从现原则对比：until 和notuntil 分析：a.They ket waiting for her until she came back. b.They didnt leave until she came back. 译：总结：until前面主句的谓语动词是; notuntil前面主句的谓语动词是练：1.昨天晚上直到完成作业我才睡觉。I go to be
5、d I my homework last night. 2.明天我会一直等到你回来。I you you back tomorrow.按要求变化下列各句1. The question can be answered by him. （改为被动语态） He the question.2. He doesnt come here. I think. （合并成一句） I think he here.3. They traveled to the moon by saceshi. （对画线部分提问） they travel to the moon?4. They had lenty of water o
6、n the bus. （改为否定句） They water in the bus.5. The work must be finished by you. （改为一般疑问句） the work finished by you?按要求变化下列各句1. Scientific research should be done carefully. （改为一般疑问句） .2. Must the et be looked after carefully? （做否定回答） .3. The dog will be taken to the hosital. （改为否定句） .4. These trees sh
7、ould be cared for by everyone. （对画线部分提问） .5. Monkeys may be cloned by scientists some day. （对画线部分提问） . Section B一、在文中找到并划出下面的短语 1发现新的事情 2掌握一些基本电脑技术3在舞台上表演芭蕾4.喜欢科学胜过舞蹈5.将被揭秘/发现 6.以为基础7.月球之旅 8.go wrong9.的开端 10.地球末日【探究案】在文中划出下面的句子并分析1.I refer science to dance. 点拨：refer - 更喜欢= likebetter 总结：a. refer sth
8、.to sth. 和比较起来更喜欢b. refer doing sth. to doing sth. - 和做某事比起来更喜欢做某事 c. refer to do sth - 更喜欢做某事(一时性的) d. refer doing sth. - 更喜欢做某事(长久性的)练：a.和重庆比起来我更喜欢厦门。I Xiamen Chongqing. b.和游泳比起来我更喜欢滑冰。I refer . 2.I really admire them. 译：点拨：admire sb. / sth. -钦佩，羡慕某人/某事 拓展：admire sb. for doing sth.- 钦佩某人做某事3.Lets
9、work hard to make our dreams come true. 点拨：make sb./sth. do sth. - 使某人/某物做某事 思考：to make our drams come true在句中做状语拓展：make sb. adj. 使某人处于某种状态; make sb. + 名词 使某人成为练：a.不要让我等太久。Dont too long. b.那个消息使他们兴奋。The news .4.Sams watch doesnt work. 译： 5.The trees are dying. 译： 思考：dying的原形过去式形容词【归纳】I. 把下列各句改为被动语态1
10、. The children must clean the blackboard after class. The blackboard by the children after class. 2. He should finish the work at once. The work by him at once. 3. Can you hel him this afternoon? he by you this afternoon?4. You may check his homework at home. His homework at home. 5. You must write a letter to him tomorrow. A letter to him tomorrow.II. 汉译英 1. 我们要做我们能做的事情。 We will do .2. 为了考试及格，他努力学。 ass the exam, he works hard.3. 他从收音机里听天气预报吗。 H
