pancil-case 复数

pancil-case 复数 case复数 “pencil case”的复数形式 pencil case的复数怎么读? pencil case的复数形式是什么? this is his pencil case 复数句 knief的复数是什么?CASE的呢? Is your case?变复数句 Exuse me!Is this your pencil case?改为复数形式 It is pencil case.改为复数是什么?0.0 It's his pencil case.(改为复数） This is my pencil case改为复数形式 请问case的复数形式cases如何发音? This is a pencil case.(改为复数句子） This tape is in that case改为复数句子 That isn't my pencil case.变为复数 英语单词的复数!voice的复数price的复数case的复数torch的复数box的复数country的复数 Case