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
Is it possible to use "can" for future abilities?
No, we have to use "will be able to."
True or false: "Might" means less possibility than "can"
False
Correct the sentence:
I'm not sure, but we must arrive at 8pm if there isn't too much traffic.
I'm not sure, but we may arrive at 8pm if there isn't too much traffic.
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.
Is it possible to use "could" to talk about permission in the past?
No, we have to use "was/were allowed to"
Choose the correct verb:
(You're looking through the window) It can't/must/could be windy - look at the trees, the leaves are moving!
It must be windy - look at the trees, the leaves are moving!
Choose the correct modal verb: She (can't /couldn't) find any books on Geology at the library right now.
She can't find any books on Geology at the library right now.
Choose the correct modal verb:
You (must/should/can) respect the traffic lights.
In the South of Spain, temperatures (might/can/must) get to 40 degrees in the summer.
You must respect the traffic lights.
In the South of Spain, temperatures can get to 40 degrees in the summer.
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.