(colloquial, rhetorical question) Said by someone who has just stated what they consider to be an unassailable truth.

Indicates that the speaker does not want to take something that is being offered.

Indicates the speaker does not know how to swim.

I am a doctor (a physician, a member of the medical profession)

Synonym of I have a fever

Indicates that the speaker's head hurts.

(formal) Used to introduce a question, implying that eliciting an affirmative answer from the interlocutor would be unlikely yet desirable for the speaker.

I don't drive (a car, a vehicle)

(idiomatic, vulgar) Synonym of I don't know

A children's game in which players have to gradually approach one of the players, the "mother", by asking "mother may I...", upon which the "mother" either replies positively, allowing the players to do the action, or to decline it.