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二、新知呈现
1、washed clothes by hand wrote letters
use a washing machine write emails
watched black and white TV watch colour TV
used films use a digital camera
Input: Teacher shows some pictures. Lead in Changes in our lives
Practice: In the past. Now
washed clothes by hand use a washing machine
wrote letters write emails
watched black and white TV watch colour TV
used films use a digital camera
Outcome:动词的过去式
1、V+ed 2、e+d 3、双写末尾字母+ed 4、以辅音字母+y变y为i+ed
Ss make sentences.
2、In the past ,people……Now, people……
三、交流展示
Role play the dialogue（角色扮演,男女生对读）
In pairs，role play the dialogue.(两人一组练习对话)
In pairs，make up dialogue about the changes.
(两人一组，编对话，并练习对话，进一步巩固句型。)四、自我检测
1、写出下列动词的过去式
call-- live-- smile-- visit---
answer-- am; is-- say-- use—
2、选择填空
（）The air of my city ___ dirty in the past, but it is___
and the sky is _____ now.
A.is; clean; blue B.was; dirty; grey C.was;clean;blue
（）I ____ thin in the past，but now I____ a little heavy.
A. am；was B.am；am C. was；am
（）They are poor，____they have heath and happiness.