A historic event that you wish you could have witnessed first hand.
Past possibility
Something that you might do this weekend.
Possibility
Something you can do which other people can't.
Ability
If you could travel anywhere next weekend, where would you go?
ability/possibility
A time that you got into trouble because you should/shouldn't have done something.
criticism
Something that people can't do under the age of 18 in your country.
Prohibition
Something you have to do this week.
Obligation
Something you need to do every day in your job.
Necessity
3 things that a visitor to your city must do.
Obligation/strong advice
Something you wish you could have studied at school.
Past possibility / opportunity
Something that you could do at an early age.
Ability
Something the others in class should know about you but probably don't.
advice
Something that you don't have to do at home.
No obligation
Something that foreigners must know before they come to your country.
Strong advice
What a close friend of yours might be doing at this moment.
Speculation - possibility
Something you had to do at school which you didn't enjoy.
past obligation