Used to express resignation, or concede defeat even though one is not convinced of the opposing arguments.

Used to speculate about a slight possibility.

I want to know how this word is written.

Used to indicate to the interlocutor that the situation being talked about could only be properly understood if that person had been present.

A phrase used to request something, for example if a statement was not heard. / A phrase used to express an apology for an action.

(idiomatic, sarcastic) Used to indicate that one is glad, or at least unmoved, to see the addressed person leaving.

One cannot always overcome a powerful adversary.

Used when somebody sees the funny side to a tough situation, to remind not to take things so seriously.

(idiomatic) Alternative form of here you are

(formal) Used as a polite introduction on first meeting another person. / Available for assisting you or for you to use.