Obligation: must, You must wear your uniform during working hours., have to (for talking about obligations), They have to start work at 9:00 o'clock., need to (taking about obligations), She needs to update her password at the end of the month., No obligation or necessity to do something: don't have to, don't need to, Employees don't have to wear an ID badge., You don't need to study Japanese., No one needs to worry, everything is uncer control., Prohibition: mustn't, can't, be not allowed to (stop someone to doing something), You mustn't leave the designated area., Employees cant use the internet during working hours., Visitors are not allowed to enter this area., Permission (talking about or asking for permission): can, I can dance., be allowed to, You are allowed to bring your pet at this restaurant.,

Modal Verbs Unit 7 B9

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