Uses of modal verbs

The uses of modal verbs are to indicate/show, Ability / Possibility

Inability / Impossibility

Asking for permission

Request and for Asking for permission.

Suggestion or

Necessity / Obligation
Prohibition
Saying what’s right or correct
Offer
Saying what’s right or correct
Recommending action
Uncertain prediction
instant decisions
Promise
Certain prediction
Making arrangementsInvitation
Preferences