- Who’s means who is.
Whose is for possession.
Some more details:
Who's = Who is
Who’s is a contraction of who is.
The apostrophe stands for the missing letter i in is.
Before you use it in writing, say who is in your sentence, to make sure it sounds right.
Whose is the possessive form of who.
Whose is a determiner.
It is used:
- in questions to ask who owns something, has something, etc.
to show which person or thing you are talking about
to give more information about a person or thing that has already been mentioned