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五、教学准备：
课件
六、教学过程：
Step1:Greet and free talk
1 what day is it today?/What date is it today?
What city do we live in? Do you like Changzhou? Why?
Let’s enjoy some pictures of Changzhou.
Some place in changzhou is clean,but some place is messy and dirty.
We should keep our city clean!
Let’s try to be a city guard!
Step2:presentation
You should finish 3tasks.
Task1:Know more about our city.
Task2:Know how to keep our city clean
Task3:Make more people know it.
Finish task 1
Brain storm
T:what do you think of our city?
S: clean/interesting/modern/noisy/dirty/messy......
(2) Work in groups.
T:What makes our city ...?
S: ... makes our city...
Finish task 2
Think and say
T:what can we do to keep our city clean?
S: To keep the ... clean, we can...
(2)Use ‘can’ or ‘can’t’ to fill in the blanks.
如果我们可以这样做，请站起来大声读出句子；
如果我们不能这样做，请坐在位子上小声读出句子。
(3)Look and write