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then we must look at the traffic lights
and wait for the green man .
Rule 2: We can wait on the pavement.
We can cross the road with other people.
How can we cross the road safely?
What must we not do on the road?
Rule 3: We must not run or play on the road.
情态动词
动词原形
must not
=
=
can/can't
should/shouldn't
must /mustn't
The rules(构成规则)
情态动词
+do(动词原形)
这几个情态动词有什么区别?
相同语境下,must语气最强,表示命令或权威;should最弱,表示建议;can则是表示允许。
Read and circle:
must 表示说话人“不许”和“禁止”某人做某事,有很强的劝告语气。Can表示有能力或有权利做某事。
Match and say:
Classroom rules
1 We must not eat or drink in the classroom.
2 We must keep quiet.
3 We mustn’t play in the classroom.
4.We must not chase(追赶)each other.
5.We must not be late for school.
6. We must not draw on the desks.