This is a knife.怎样变复数.

This is a knife.怎样变复数. Is this her knife变复数 This is a knife 改为复数 this is knife in the box（变复数句 This is a box and that is a knife.改为复数形式〔怎么变的〕 “knife”怎样变复数形式? This is an apple,that's a knife句型转换 This knife is sharp and that knife is blunt 翻译 把This is a box and that is a knife.改成复数形式 This is a box and that is a knife （改为复数句） This is a pen and that is a knife改为复数形式 This is 是什么句型?怎样变疑问句 Whose knife is this?(改成复数) Is this your knife 改为复数句子 this is my knife改复数句 This knife is broken.(同义句) She has a knife.变复数句 This is a __.Those are three__(knife)用所给单词填空