Question

One sentence whith WHOSE

Answer 1

I saw the man whose car you fixed.

Whose is that umbrella?

That’s the neighbor whose tools I borrowed. 

Answer 2

Hola
Whose para preguntar es de quien
Whose house is that? De quien es esa casa?

Whose como conector significa a quien, de quien, cuyo o cuya
The man whose picture is here is my friend. El hombre cuya foto está aquí es mi amigo

Espero te sirva