Modal verb functions

I shouldn't have argued with Ann. Now I feel bad.

• past regret

• advice

• ability

• past request

I'm only allowed to visit you if my brother is with me.

• permission

• ability

• obligation

• prohibition

You ought to speak louder to the teacher when you're being tested.

• advice

• past regret

• request

• permission

You're not allowed to have fire on the campsite. It's dangerous.

• prohibition

• permission

• no obligation

• ability

You mustn't skate in public parks. It's too dangerous.

• prohibition

• permission

• no obligation

• ability

You don't have to wear a school uniform in this school.

• no obligation

• permission

• advice

• prohibition

You should see a doctor if your backache persists.

• advice

• past regret

• request

• permission

You may not smoke in public areas. It's forbidden by law.

• prohibition

• permission

• no obligation

• ability

You have got to work harder if you don't want to be fired by the boss.

• obligation

• ability

• permission

• advice

You need to get vaccinated if you want to keep your job in this hospital.

• obligation

• ability

• permission

• advice