It is a yellow skirt .怎样变复数?

It is a yellow skirt .怎样变复数? It's her skirt变复数 What color is it怎样变复数? it is a libriary 改复数句,that kite is yellow对yellow 提问,that mou Is it a cat?要求变复数 怎样变一般疑问句 例如；that is a yellow jacket This is a knife.怎样变复数. she is a teacher.变复数 it is a pen.变复数 this is my The yellow skirt is my skirt He is a baby变复数 It is a fish变复数 Look!There are so 把下列句子变为复数.This is a watermelon.It is yellow shirt.That's my "Lucy" is wearing a yellow skirt.（对加引号提问） ___ ___ a yellow s