Написать чего нельзя делать. 1he/be late. late. 2.they/run at school. at school. 3.she/watch tv watch tv. 4.we/do our homework at the lesson. homework at the lesson. 5.you/skate here. here.

1he mustn't /be late.
2.they mustn't /run at school.
3.she mustn't /watch TV
4.we mustn't /do our homework at the lesson.
5.you mustn't /skate here.