OBLIGATION
She must study for her exams.
She has to study for her exams.
It is prohibited to cross that line. (You...)
You mustn't cross that line.
You can't cross that line.
You should learn a foreign language.
You ought to learn a foreign language.Do you have the ability to play an instrument?
Can you play an instrument?
Do you have permission to go to the party?
Can you go to the party?
They are obliged to watch that film.
They must watch that film.
They have to watch that film.
It is forbidden for her to go to the party.
She mustn't go to the party.
She can't go to the party.
It isn't a good idea for you to forget it.
You shouldn't forget it.
You ought not to forget it.
My brother has the ability to run very fast.
My brother can run very fast.
They have permission to stay up late.
They can stay up late.
It is not necessary for me to buy a house.
I don't have to buy a house.
It is forbidden for the students to use their phones.
Students mustn't use their phones.
Students can't use their phones.
It is advisable for them to go on a diet.
They should go on a diet.
They don't have the ability to sing.
They can't sing.
She doesn't have permission to travel alone.
She can't travel alone.
Last year I was obliged to do Maths.
Last year I had to do Maths.
It is prohibited to smoke in bars now. (You...)
You mustn't smoke in bars.
You can't smoke in bars.I don't advise you to become a doctor.
You shouldn't become a doctor.
You ought not to become a doctor.
She will have the ability to ride a motorbike next year.
She will be able to ride a motorbike next year.
Did she have permission to do it?
Could she do it?
We are obliged to learn to drive.
We must learn to drive.
We have to learn to drive.
It is forbidden for them to drink alcohol.
They mustn't drink alcohol.
They can't drink alcohol.
It is a good idea for us to take up a sport.
We should take up a sport.
I didn't have the ability to swim when I was a baby.
I couldn't swim when I was a baby.
I wasn't able to swim when I was a baby.
She won't have permission to borrow the book.
She won't be allowed to borrow the book.