someone is / someone has

The possessive adjective for someone.

plural of someone

some person.

A partially specified but unnamed person. / an important person

(MLE) This is what (the named person) said or did; used in recounting events, etc.

Used as an intensifier for actions causing harm or detriment to someone / Used to indicate that an action normally beneficial may be performed in a way that causes harm or detriment to someone.

(informal) One's decisions or actions will bring undesirable consequences only on oneself.

(idiomatic, mostly used conditionally) in someone's situation.

Fully available to help or to be of use to someone, or some organisation. / (formal) By way of introduction on first meeting another person.