whose 作疑问代词用时,可作表语或定语,作定语时,要连同它所修饰的名词一起放在句首。
比较
Whose is this pencil? 这支铅笔是谁的?(whose作表语)
Whose pencil is this? 这是谁的铅笔?(whose作定语)
Whose are these books? (正)这些书是谁的?(whose作表语)
Whose books are these?(正)这些是谁的书?(whose作定语)
Whose books are they?(正)它们是谁的书?
Whose is this?(正)这是谁的?
Whose is it?(正)这是谁的?
Who's the girl? 这个女孩是谁?(who's=who is)
Whose is the girl? 这个女孩是谁家的?
Whose are books?(误)
Whose is the books?(误)