Unit3 We should obey the rules.(Lesson17) 课件(共33张PPT)

Unit 3 We should obey the rules.
Lesson 17
We should obey the rules.
Ask and answer questions actively .
Don't eat in class.
Don't make noise .
Be quiet .
祈使句：
是表示命令、请求、建议或劝告的句子。
肯定祈使句一定是以动词原形开头 (有时用please)，否定祈使句，在句子前面加Don’t。

Idols(身边榜样):
who obey the rules very well in our school?
XX is a good student at school.
XX comes to school early.
XX never makes noise in class.
XX……
Why is Peter not a good boy at home?
He doesn’t like to do housework.
He reads in bed and
he goes to bed very late.
He watches TV too often.
He often makes a mess in his room.
Tips：
Should: 应该,情态动词,后面加动词原形,
变否定句时在should 后面加not,
缩写为shouldn’t.
Do they obey the rules?
what must we do?
必须
must: 必须， 情态动词，后面加动词原形，变否定句时在must 后面加not,缩写为mustn’t,可以翻译成一定不要。
We must keep off the grass.
不接近
what must we do?
pick flowers
摘花
We mustn’t pick flowers.
what mustn't we do?
We mustn’t litter .
litter
乱丢杂物
No Litting!=Don't litter.
You must take good care of young children.
好好照顾
小孩子
Children
child
You mustn’t spit on the ground.
吐痰
地面
You must help old people.
red light
wait for
等待
green light
cross the street横穿马路
What will you say to them?
You mustn't cross the street now.
You must wait for the green light.
You mustn't play on the street.
Look out!
争做文明志愿者
Practice
1）We ________cross the street.
A. must B. mustn’t
2）We ______wait for the green light.
A. must B. mustn’t
3）We_______ keep off the grass.
A. must B. mustn’t
4）We_________ take good care of young children.
A. must B. mustn’t
5）We________ litter.
A. must B. mustn’t
B
A
A
A
B
Practice
英翻汉
You mustn’t cross the street.
________________
2. You must keep off the grass.
_________________
3.You must take good care of young children.
___________________
4. You mustn’t spit on the ground.
___________________
你禁止穿越街道。
你必须远离草坪。
你必须照顾好小孩子。
你禁止随地吐痰。
Summary
1.Look out .小心
2.must 必须 mustn’ t 禁止
You must
wait for the green light.
keep off the grass.
take good care of the young children.
You mustn’t
cross the street.
pick the flowers.
spit on the ground.
litter.
THANKS FOR WATCHING
We should obey the rules.
Answer the questions :
Is Gao Wei a good boy?
2.Does he know the school rules very well?
3What is his group doing?
Yes, he is.
Yes, he does.
His group is making a list of class rules.