Whose knife is this?(改成复数)

Whose knife is this?(改成复数) whose knife is this?将句子变成复数 This knife is sharp and that knife is blunt 翻译 Whose book is this? Whose ruler is this? whose is this book? “Whose room is this? Whose hat is this? This is a knife 改为复数 Is this your knife 改为复数句子 This is a knife.怎样变复数. this is my knife改复数句 Is this her knife变复数 This knife is broken.(同义句) whose spanner is this 翻译 whose sweater is this是什么意思 Whose game is this?中文 whose money is (this,these)?