Simple Modals

Will


(in future tense)


I will be there.

(in requests)


Will you do it for me?

Won't


(negative of will)


No, I won't.

Can


(to indicate ability)


I can do it.


(in requests)


Can you help me?


(informally to ask permission)


Can I use your phone?

Can't


(negative form of can)


No, you can't.

May


(to indicate possibility)


I may go to New York.


(to ask permission)


May I help you?

Could


(to indicate past ability)


He could play cards well.


(to indicate possibility)


I could give you a ride.


(in requests)


Could you open the door please?


(to ask permission)


Could I use your restroom?

Couldn't


(negative past tense)


I couldn't help it.

Should


(to express obligation)


I should go to the wedding.


(to conjecture)


He should be in Miami by now.

Shouldn't


(negative suggestions)


You shouldn't do that.