I am not able to swim in deep water
can't
We are required to bring our ID to enter.
need to / must
You are advised to apologize to your friend.
ought to / should
He was unable to finish the test on time
couldn't
We are forbidden to smoke inside the school
mustn't
She was forced to wake up early for work.
had to
You are required to complete the application form
must
She was required to take an extra test before graduating
had to
This is possible to be a good solution
may