Modal verbs for obligation and permission - Foc ...

You ______________ be physically fit to be a fire-fighter. a can b have to c need

Offi ce workers usually ________________take many breaks during the day. a can’t b don’t have to c needn’t

A doctor _____________________________ often work long hours and night shifts. a must b needn't c can’t

You are not obliged to work on Sundays. -

It’s forbidden to smoke in here.

A journalist ____________________ write things which are not true. a needn’t b doesn’t have to c mustn’t

You _____________take a taxi. I can drive you to work. a can’t b needn’t c mustn’t

It’s forbidden to walk on the lawn.

A teacher ____________________look smart or wear a suit to work. a mustn’t b doesn’t need to c can’t

It’s unnecessary for you to wait here.

Self-employed people ____________ take a holiday any time they choose. a need to b have to c can

It isn’t necessary for them to work on Sunday.

Airline pilots _________________ have excellent eyesight. a must b need c can

You’re not allowed to wait here.