单数变复数Is your uncle behind the armchair?
问题描述：
单数变复数Is your uncle behind the armchair?
答
Are your uncles behind the armchairs?变复数时，有复数的词都要变，比如：be动词，名词（不可数名词和单复数相同的名词不变），代词。
答
Are your uncles behind the armchairs?
答
Are your uncles behind the armchairs?
单数变复数把相应的单数形式的单词全部变为复数形式即可.