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2)句子：
Then and now.
He used the telephone at home and in the office to call people.
Now he has a mobile phone and he can call people anywhere.
Thirty years ago, Mike’s granpa listened to the radio and read newspapers for news.
Now he can read and watch news on the Internet.
He reads e-books too.
Twenty years ago, Mrs brown made friends at school.
Now she has e-friends from all over the world.
She does shopping on the Internet too.
3.能运用所学句型和词汇简单谈论科技如何改变生活的。
教学重点：
·句型：… ago, he / she … Now he / she …
·词汇：ago, office, newspaper, news, e-book
教学难点：
·句型：一般过去时与一般现在时的比较和运用
·词汇：mobile phone等词的读音及动词过去式
教学准备：
1.多媒体、教学光盘
2.收集一些如留声机、蒸汽火车、胶片电影、老式的电视机、数码相机、智能手机、平板电脑、电子阅读器等图片
3.教师儿时、现在的两张照片
教学过程;
A. Warming up
1. Greetings
2.欣赏图片，引入话题
3.出示留声机、蒸汽火车、胶片电影、老式的电视机、数码相机、智能手机、平板电脑、电子阅读器等图片，引导学生判断哪些是当代的事物，哪些是过去的事物，用now和then来归类。学习课题Then and now
B. Presentation and practice
1.出示教师的两张照片，师生谈话
T: Look at this photo. Who is this? Can you guess?
S1: Is it you?