Modal Verbs

A modal is a type of auxiliary (helping) verb that is used to express: ability(здатність,спроможність), possibility(можливість,змога), permission or obligation(дозвіл,забов`язання). The modals in English are:
Can/could/be able to-могти; може; бути в змозі.
May/might- може (менш впевнено); може (більш впевнено)
Shall/should – запитати про щось; дати пораду
Must/have to – повинен (нагальна потреба); повинен
Will/would – хотіти (бажати); коли ми щось хочемо,але не можемо

ABILITY
(здатність,можливість)

Can, Could, Be Able To:
are used to express a variety of ideas in English

Present and Future:
It is formed:
can/can’t + base form of the verb
E.G.:
Tom can write poetry very well.
I can help you with that next week.
Lisa can’t speak French.

am / is / are / will be + able to + base form of the verb
am not/ isn’t / aren’t/ won’t be + able to + base form of the verb
E.G.:
Mike is able to solve complicated math equations
The support team will be able to help you in about ten minutes.
I won’t be able to visit you next summer.

Past:
could / couldn’t + base form of the verb
E.G.:
When I was a child I could climb trees.

was / were + able to + base form of the verb
wasn’t / weren’t + able to + base form of the verb
hasn’t / haven’t + been able to + base form of the verb
E.G.:
I wasn’t able to visit her in the hospital.
He hasn’t been able to get in touch with the client yet.

NOTE:
Can and could do not take an infinitive (to) and do not take the future auxiliary will.
Incorrect: I can to help you this afternoon.
Correct: I can help you this afternoon.
Correct: I will (I’ll) be able to help you this afternoon.

POSSIBILITE -
IMPOSSIBILITY
(можливість\неможливість)

can / can’t + base form of the verb
E.G.:
You can catch that train at 10:43.
He can’t see you right now. He’s in surgery.
could + base form of the verb
E.G.:
I could fly via Amsterdam if I leave the day before.

May, Might
May and might are used to talk about possible
active in the future.

POSSIBILITE -
IMPOSSIBILITY
(можливість\неможливість)