Tom'u kovmak kimin fikriydi. - Whose idea was it to fire Tom?
Tom'u kovmak kimin fikriydi.
Whose idea was it to fire Tom?
Bunlar kimin kitapları? - Whose books are these?
Bunlar kimin kitapları?
Whose books are these?
We saw several houses whose roofs are falling off. (=The roofs are falling off several houses we saw.).