Modal verbs for obligation

You mustn’t eat candies in the classroom.

• Obligation

• Prohibition

You don’t have to bring your backpack today.

• Obligation

• Lack of obligation

You have to arrive to school on time.

• Obligation

• Lack of obligation

You must clean your bedroom.

• Obligation

• Prohibition

You mustn’t bring toys to the school.

• Obligation

• Prohibiton

You don’t have to cook the dinner for your family.

• Obligation

• Lack of obligation

You must eat your vegetables.

• Lack of obligation

• Obligation

You don’t have to copy all the information.

• Prohibition

• Lack of obligation

You must clean your desks.

• Obligation

• Prohibition

You mustn’t shout in the class.

• Lack of obligation.

• Prohibition