whose (Whose bag is this?)
whose (Whose bag is this?) means “Asking about ownership: whose alone or whose + noun”. Whose asks who something belongs to. Formation: Whose + noun ...? · Whose is/are ...?
Asking about ownership: whose alone or whose + noun
A2Formation
Whose + noun ...? · Whose is/are ...?
Explanation
Whose asks who something belongs to. Put it before a noun: Whose bag is this? Whose keys are these? You can also use whose alone when the thing is clear: Whose is this umbrella? The answer often uses a possessive: It's mine. / They're Tom's.
Examples
Note
Don't confuse whose with who's (= who is): Who's that? and Whose is that? sound the same but mean different things.
FAQ
whose (Whose bag is this?) — what does it mean and how is it used?
Asking about ownership: whose alone or whose + noun. Whose asks who something belongs to. Put it before a noun: Whose bag is this? Whose keys are these? You can also use whose alone when the thing is clear: Whose is this umbrella? The answer often uses a possessive: It's mine. / They're Tom's.
whose (Whose bag is this?) — how do you form it?
Whose + noun ...? · Whose is/are ...?
whose (Whose bag is this?) — any usage notes?
Don't confuse whose with who's (= who is): Who's that? and Whose is that? sound the same but mean different things.