人教必修二unit3 导学案

Unit 3 Computer

第一课时warming up，pre-reading & Reading

学习目标：

1．语言目标Language aims:

1）学会谈论电脑所用的有关单词和短语: calculate, universal, simplify, sum, operator, logical, technological, revolution, artificial, intelligence, solve, reality, personal, tube, network, web, application, cinance, mobile, rocket, explore

2）让学生了解计算机的历史和基本知识。2. 能力目标Ability aims:

1) 进一步熟悉掌握一些阅读技巧，比如快速寻找文章细节信息(scanning)、归纳和总结（summarizing）。

2) 让学生学会表达自己的观点。

3. 情感目标Emotional aims:

1）引起学生学习电脑的兴趣。

2）培养学生的合作学习能力。

重点key points:

1. let students learn more about history and basic knowledge of computers.

2. Get students to learn different reading skills.

难点important points:

1. Develop students‟ reading ability.

2. Enable students to learn to express their opinions.

自主学习

词汇知识

I根据词性和汉语意思写出该单词

1. ___________ (vt.) 计算_____________(n.) 计算；考虑______________(n.)计算者，计算器

2. ____________(vt.) 简化____________(n) 简化

3. ____________(n.) 智力；聪明_________________(adj.)

4. ____________(adj.) 私人的；亲自的______________(adv.) 就个人而言；亲自

5. ____________(n.) 幸福；快乐_______________(adj.)

6. _____________(n.) 真实；现实____________(adj.)

II 重点短语

1.have sth. _____ common ____ 和……有共有之处

2. ________...with …把……与……相比

3. from ________ / ________ on 从那时/这时起

4. go _________ 过去；经过；走过

5. so… ______ …如此…以致……

6. as a ___________结果

7. provide ab. ________ sth. 为某人提供某物8. __________ sth. with sb.与某人分担

9. as ________ as …既…….又…….，不但……..而且…….

阅读理解

1. 主旨归纳Skim( 略读) for the main idea

Tips : 统揽全文，注重第一段，获得大意即可，不要句句阅读。一定要快呦！

1．Who am I ?

A．An operator．B．Alan Turing．C．A computer．D．Human race．

2. What’s the passage about?

It‟s about the ________________ of computer.

2. 细节理解Scanning for detailed information

Summary of the passage

I began as a __________ machine in 1642. It took nearly two hundred years __________ I was built as an analytical machine. I became a “universal machine” in 1936 to __________ any mathematical problem. I was very big at one time. However, as time _______ by, I was made smaller and smaller. I was given a family _______ by a network in the early 1960s. I was able to _____________ my knowledge with others ___________ the World Wide Web.

I have been widely used in many fields, such as in communication, _____________, trade and medical __________ .

I have also been put into robots and space rockets to _____________ the Moon and Mars. I‟m glad I am a devoted friend and helper of the human race.

合作探究

1. In pairs discuss what they have in common．两人一组讨论它们有什么共同点。

●common

(1)adj．普遍的，常见的，普通的

①He is not an officer，but a common soldier．他不是军官，只是一名普通士兵。

(2)n．共同之处；共同的特点

②The twin brothers have a lot in common and get on very well.

这对双胞胎兄弟有许多共同之处，相处很融洽。

▲in common共有；共用

【拓展】

1. have something／a lot／much／little／nothing in common

有一些／有很多／几乎无／无共同之处

2. in common with…和……一样

【活学活用】

(1)______ ______ _____ many other boys, he prefers outdoor sports.

同其他许多男孩一样，他更喜欢户外运动。

(2)The swimming pool is used _____ _____ by all the chillren in the neighbourhood.

这个居民区的所有儿童公用这个游泳池。

(3)They found they_____ _____ ______ ______ ______and got on very well．

他们觉得有许多共同之处，关系处得很好。

(4) They have a lot _____ and became good friends very soon.

A. in common

B. in case

C. in surprise

D. in interest

2.I began as a calculating machine in France in l642．1642年我在法国诞生时是一台计算机器。

【导学】calculate vt.& vi．计算，估计，算出

1) calculate十名词计算；估计

①The teacher calculated the average mark of the class．

老师计算班上的平均分数。

②Calculate the cost of repair at￥5000．

估计修理费用约5千元。2) calculate+that／wh一十从句计算出；估计为

The scientists calculated when the spacecraft would reach the moon.

科学家推算出宇宙飞船抵达月球的时间。

3) be calculated to do…被计划成……；打算……

His remark was calculated to hurt her. 他的话是故意要伤她的。

【拓展】calculation n.计算calculating n．精明的；会计算的calculator n．计算器

【注意】calculate表“计划；打算”讲时，多用_________ 语态。

【活学活用】

①那则广告计划以女孩子为宣传对象。

That ad _____ _____ _____ attract the attention of girls．

②Scientists have ______that the world‟s population will double by the end of this century．

A．numbered B．included C calculated D．designed

3. I develop very slowly and it took nearly two hundred years before I was built as an analytical machine by Charles Babbage. 我发育缓慢，差不多到了两百年之后，查尔斯. 巴比奇才把我制成了一台分析机。

【导学】“It took / was + 一段时间+ before 从句”是一固定句型，意为“过（一段时间）之后才……”(B级) e.g. It took long / five hours before we arrived at the village.

过了很久（五个小时）我们才到村庄。

It was two years before I realized how important his words were.

两年之后我才意识到他的话多么重要。

【拓展】

before 用于这类句型的结构还有：

① It didn't take long before the fire was under control.

不久火势就被控制住了

②It will be five years before we meet again.

要过五年我们才能再见面。

③ It won‟t be long before the manager comes back..

不久经理就要回来了。

【句型归纳】

① It took / was long / 一段时间+ before …过了（一段时间）之后才……

②It didn't take / wasn‟t long /一段时间+ before …过了不久（一段时间）就……

③It will take / be long / 一段时间+ before …要过很久（一段时间）才……

④It won’t take / be long / 一段时间+ before …不久（一段时间后）就会……

【活学活用】

① The field research will take Joan and Paul about five months; it will be a long time ____ we meet him again.

A. after

B. before

C. since

D. when

②--- How long do you think it will be ______ China sends a manned spaceship to the moon?

--- Perhaps two or three years.

A. when

B. until

C. that

D. before

4. As time went by，I was made smaller．随着时间的推移，我被做得越来越小。

【导学1】as conj．随着……，引导时间状语从句。