Ex1 : sử dụng can /cannot/must/mustnot
1. I...swim,I go swimming every day
2.the traffic lights are red .You....stop
3.The car goes very fast.We....be careful
4.You.... play football in the street
5.My brother....drive a car because he very young
1.can
2.must
3.must
4. mustnot
5. cannot
1. I.can..swim,I go swimming every day
2.the traffic lights are red .You.mustn't...stop
3.The car goes very fast.We..must..be careful
4.You.mustn't... play football in the street
5.My brother...can't.drive a car because he very young