—Whose schoolbag is this?

Is this your schoolbag? 是is this schoolbag your还是is this schoolbag yours This is (Vivian's) schoolbag. —whose pencil case is this whose is this book? Whose book is this? Whose hat is this? “Whose room is this? whose shirt is this ---Whose dress is this? This is his schoolbag.(改为同义句） The schoolbag( this is not her schoolbag,( ) is red.