ABILITY
Which modal verb do we use to express ability in the present?
Can
Which modal verbs do we use to express obligation?
Must and have to
Which modal verbs do we use to give advice?
Should and ought to
Which modal verbs do we use when we're certain about our deduction?
"Must" when we're certain something is true and "can't" when we're certain something is not true.
Which modal verb do we use to express ability in the past?
Could
Which modal verbs do we use to express possibility?
Can, could, may and might
Which modals verbs do we use for permission?
Can, could and may
Which modal verbs do we use when we think something is true but we're not completely sure?
May, could and might
Correct the sentence:
When I was young, I can play the piano, but I can't sing very well.
When I was young, I could play the piano, but I couldn't sing very well.
Do "mustn't" and "don't have to" mean the same thing? If not, what is the difference?
No. "Mustn't" means prohibition and "don't have to" means it's not necessary to do it.
Choose the correct modal verb:
If you feel sick, you (should/may/could) go to the doctor
(You're talking to your boss): Can/Should/May I borrow your pen?
If you feel sick, you should go to the doctor.
May I borrow your pen?
Choose the correct modal verb:
(Someone knocks at the door in your house)
It may/must/can't be the deliveryman, my package is supposed to arrive today or tomorrow.
It may be the deliveryman, my package is supposed to arrive today or tomorrow.