What's this 的复数形式

What's this 的复数形式 英语What's this?的复数形式是? What's this?怎么改为复数形式 What’s this?复数形式简单吧 What s this in Engilsh? 改为复数形式 复数形式怎么改例如what‘s this in Eglish What's that的复数形式 what;s this的复数句 this的复数形式 帮我把英语句子化成复数形式!What's this in English?What's this?What color is it? 英语句的复数形式What is this?It is a desk.改为复数形式 what's this?It's a box.怎么改成复数形式?下面几题也说下就是 写出下列句子的复数形式this is my book.is that your sister?that is my baseball.is this your friend?what's this in english? She's a girl What's this in English What's that in English 这些怎么变复数形式? What's this in English?改为复数形式：（ ）（ ）in English? what make is this clean car?it's ford 改为复数形式 This的复数形式快...,.. 升么是this的复数形式