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1. 体会情态动词must及其否定must not 的用法，并能简单区分形容词safe,名词safety及副词safely的不同。
2. 能牢记过马路的交通规则，树立安全意识。
课前准备：
课件
教学过程：
Step 1 Pre-reading
T: Good afternoon,class. Do you like singing?
Sing a song:traffic lights
T: what’s the song about? Teach :safe﹨safety
Shoe the tittle: Unit 4 Road safety
Step 2 presentation
T: in this class, we will have a PK between boys and girls. If you can finish some learning aims, you can move forward. Who can get here first or go further, they can be road safety models. Are you ready foe this class?
Show the learning aims
3.学习课文第一部分
(1)T: How can we cross the roads safely ？Let’s learn from the storytime.
Listen and finish the form:
At the zebra crossing
first
Look for a zebra crossing
then
Look at the traffic lights and wait for the green man
(2)Teach: green﹨red man
T: What is green man? What is red man? What do they mean?
The policeman tells us. Let’s read and act.
(3)Read and act the policeman.
4.自读课文，学习课文第二部分
T:But sometimes you cannot find a zebra crossing near you.How can we cross the road safely?
(1)judge sentences
(2)回答问题并完成表格信息。
No zebra crossing