Say a modal verb used to express ability or inability in the present.

Say a modal verb used to express general ability or inability in the past.

Say a/some modal verb/s used to express specific ability or inability in the past.

Say a modal verb used to express ability or lack of ability in the future.

Say a modal verb used to ask for permission in the present and in informal situations.

Say a modal verb used to ask for permission in the present in formal situations.

Say a modal verb used to ask for permission in the present in quite formal situations.

Say a modal verb used to express that someone has permission to do something.

Say a modal verb used to express certainty about something in the present.

Say a modal verb to express, in the present, that something is very probable.

Say two modal verbs to express a possibility quite remote in the present.

Say a modal verb to express that something is impossible in the present.

Say a modal verb to express obligation when the authority comes from the person who is speaking.

Say a modal verb to express an obligation related to rules and regulations.

Say a modal verb to express necessity to do something.

Say a modal verb to express an obligation in the past.

Say three modal verbs to express lack of obligation in the future o in the present.

Say two modal verbs to express lack of obligation in the past.

Say a modal verb to express prohibition in the present.