Unit 3 We should obey the rules Lesson 17 课件（共15张PPT)

(共15张PPT)
Unit 3　Lesson 17 第5课时
五年级下
Lead-in
Review
You should… / You shouldn’t…
Lead-in
What do you think of them
Do they obey the rules
Presentation
Look at the picture and discuss.
Presentation
Just talk
Presentation
must
mustn’t
must not
动词原形
Presentation
must
mustn’t
should
shouldn’t
应该
不应该
必须
禁止
Just talk
Practice
You mustn’t ________ the street now.
cross
Just talk
Practice
You mustn’t ________ on the ground.
spit
Just talk
Practice
You mustn’t ________ the flowers.
You must ____________ the grass.
keep off
pick
Just talk
Practice
You must _______________ young children.
You mustn’t _________.
litter
take good care of
Let’s act!
Practice
You must keep off the grass.
Practice
You ________ cross the street now. You ________ wait for the green light.
You ________ pick the flowers.
You ________ spit on the ground.
You ________ litter.
You ________ keep off the grass.
You ________ take good care of young children.
must
mustn’t
mustn’t
must
mustn’t
mustn’t
mustn’t
must
must
Summary
如何表达你必须和禁止做某事？
You must / mustn’t…
例如：
You must keep off the grass.
You mustn’t pick the flowers.