八年级英语下册《Lesson 23》导学案 北师大版

1、Lesson23【学习目标】1.掌握一些介绍网络使用有关的词汇:perly2.介绍网络的优缺点【重难点预测】重点：phrases:be able to.far away.aside from.take up难点：介绍网络的优缺点【学习流程】、预习检测根据汉语提示完成单词1.Internet has lots of _(优点 )2.Internet can make our life wasier and _(更简单 )3.Air pollution (污染 )

2、_(引起 ) health prablems4.Someone uses the Internet to _(偷 ) others in formation5.He is aways _(担心 ) about his math examII.自主探究在文中找出关于网络优点和缺点的句子各一个Advantage:Disadvantage:、合作交流 探究要点:1.People are able to connect and share in information in seconds in seconds 在短时间内eg. I can finish my homework in seconds

3、be able to do sth 能够做某事,后跟动词原形eg. She is able to swim 她会游泳辨析:be able 与can(1)表示能力时是同义词,在表达现在或一般能力时可以互换(2) can只有现在时和过去时could ,而be able to 有更多的时态形式对应练习1.Most children _ walk at the age of 15 monthsA.be able to B.is able to C.are able to D.can be able to2. It opens up the world to us 它使我们了解了世界open up st

4、h , to sb 对某人打开某物eg. The Internet open up the worl to us 3. Spending too much time online is harmful to peoples health 花太多时间上网对人们的健康有害be harmful to 对有害同义短语为_对应训练砍树对环境有害Cutting down trees _ _ _ the environment、知识梳理英汉互译1.在短时间内 2.遥远3 . aside from 4.占用,占据5. be harmful to 6.个人信息 7.当心,小心 8.stay in touch w

5、ith、课堂检测1.People are able to connect and share in formation _A.with second B.in second C.with seconds D.in seconds2.And if a friend lives far away , the Internet makes it easy _A.stay in touch B.stay with touchC.to stay in touch D.to stay with touch3.The Internet can be a useful toob, but dont let i

6、t _ all of your timeA.take on B.take away C.take after D.take up4.Internet helps _ the world _ peopleA.open up ; to B.open out; toC.open up; for D.open out ; for翻译下列句子1.互联网改变了世界2.互联网有优点也有缺点3.任何事物都具有两面性、拓展延伸用适当的介词填空1.The Internet opens up the world _ us 2.If a friend lives far away , the Internet mak

7、es ir easy to stay _ touch3.Smoking is harmful _ peoples health4.People are able to cinnect and share information _seconds5.Aside _ that , some people attack the web or use the Internet to steal others personal in formation完成句子1.在许多方面,它让生活更容易,更简单_ many ways it makes life _ and _2.如果一个朋友住得很远,因特网能很容易地(与他/她)保持联系If a friend lives _ _ , the Internet makes it easy to _ _ _3.花费太多时间上网对人们的健康是有害的_ _ _ time online is _ _ peoples health4.除此之外,有些人侵袭网络或使用因特网去窃取别人的私人信息,甚