1、Unit 4 Amazing Science,Welcome to the unit,Topic 2,When was it invented? Section B,New words,bulb 电灯泡 clone 克隆 experiment 实验 benefit 使受益，对有用 organ 器官， AIDS 艾滋病 laptop 便携式电脑,1a Listen, read and say,digital camera,Look and read,light bulb,mobile phone,1.Who invented it? Edison. 2.When was it invented?
2、 In 1879.,Look, listen and answer,3.How many inventions did he invent during his life?About more than 1000 inventions.,1. Whats this? A radio. 2.Who was it invented by? Guglielmo Marconi. 3. When was it invented?In 1895.,1.Whats this? An airplane. 2.Who was it invented by? Wilbur and Orville Wright.
3、 3.When was it invented?In 1903.,This is the cloned sheep ,Dolly. What is used in cloning?Its DNA.,Look and discuss,Discuss the questions in 3a and then mark the statements (T) for true or (F) for False. ( )1.The cloned sheep, Dolly, was cloned in Canada.,F,3b Group work,( ) 2. So far, scientists ha
4、vent cloned any pigs. ( )3. Every part of our body has different DNA. ( )4. There is DNA in most living things.,F,F,F,Explanation,1. Spaceships are mainly controlled by computers. 宇宙飞船主要是由电脑控制的。此句为一般现在时的被动语态。其结构为：系动词an/ is/ are动词的过去分词。 如：The classroom is often cleaned by us three times a day.我们经常每天打
5、扫三次教室。main (adj.) mainly (adv.) 主要地，大部分地 如：This cake is mainly made of milk and flour.这种蛋糕主要是用牛奶和面粉做成的,2. Its important to master computer technology. 掌握电脑技术是重要的。,（1）master v. 掌握，精通 如：Mastering new skills is very necessary for you in the future.掌握新的技能对你将来是非常必要的。 拓展master n. 主人 如：Everyone is the mast
6、er of his own future. 每个人都是自己未来的主人。,（2）it作形式主语，不定式短语to master computer technology 是宾语从句的逻辑主语。 如：Do you think it is necessary to go for a walk after meals?你认为饭后出去散步有必要吗？,3. So I advise you to study harder to make computers serve us better. 为使电脑更好地服务于我们的生活，所以我建议你更加努力学习。,不定式短语to make computers serve us
7、 better 作study的目的状语；serve us better作computers的宾语补足语。如：The boss ordered his workers to do more work to make himself get more money. 那个老板为了让自己得到更多的钱，命令他的工人做更多的工作。,4. Mr.Lee expected Kangkang to learn to use computers well and make computers serve us better in the future. 李老师期望康康学会熟练地操作电脑，使电脑更好的服务于我们将来
8、的生活。,expect 期望，认为，预料 如：We are expecting a rise in food prices this month.我们预计这个月的实物价格会上涨。expect sb. to do sth. 期盼/盼望某人做某事 如：We were expecting him to arrive yesterday. 我们昨天一直盼望着他到达。expect（that）从句 期望/盼望 如：Many people were expecting (that) the peace talks wouldnt break down.许多人期望和平谈判不会破裂。,5. Some are r
9、eady-to-eat and others are not. 一些是即食食品，其他的不是。,others泛指别人，其他，其余的一部分（并不包括所剩下的）。如： There are many flowers in the garden. Some are red, some are yellow, others are blue. 花园里有许多花，一些是红的，一些是黄的，还有一些是蓝色的。（还可能有紫色的等） 链接（1）other adj. 别的，其他的。作定语，other复数名词others。 如： My English teacher doesnt like it, but other t
10、eachers (others) may like it.我的英语老师不喜欢它，但是别的老师可能会喜欢它。 Im busy now, ask me about it some other time. 我现在很忙，关于这件事在另外某个时间再问我吧！,（2）the others表示一定范围内“其余的，其他所有的”，相当于the rest 或是all the others。 如：Some of the flowers are red, but the others are yellow.这些花中的一些是红色的，而其他的都是黄色的。（没有其他颜色的了）,（3）one the other 两个或两物中的
11、一方另一方，前文必须交代有两个或暗含有两个。 如：Mr. Green has two sons. One is a teacher, the other is a doctor. 格林先生有两个儿子，一个是教师，一个是医生。One sock is under the bed, where is the other? 一只袜子在床上，另一只呢？,课堂互动,T：同学们，本结课我们复习了动词不定式作主语、目的状语的用法。上个话题我们学习并总结了疑问词加不定式这种用法，八年级下学期我们了解了动词不定式，对于动词不定式你们掌握得如何？请举例说明。 S：我通过比较、分析得出以下判断： （1）作主语 如：I
12、ts easy for the bicycle to park because it needs less space.自行车容易停放，因为它需要较少的空间。Its important for teenagers to master computer technology.对青少年来说，掌握电脑技术很重要。,（3）作定语。 如：The suggestion to solve the problem is good.解答问题的建议是好的。The best way to learn a foreign language is reading.学习外语的最好方法是阅读。 （4）作宾语补足语。 如：His father told him not to shut down the computer.他爸爸告诉他别关电脑。,
