A1( extra grammar): Modal verbs: must and mustn't

Extra grammar point:
Must and mustn't to express obligation and prohibition.
To interpret road signs we use must, mustn't.

TO TALK ABOUT RULES WE USE MODAL VERBS.

• Practice: interactive book with social rules (at school, at the park, at the museum).
• Practise must and mustn't with "The highway game"

• Read this POEM  ( Just a Farmer by Helen Coon)