pen 复数要正确,英文

pen 复数要正确,英文 It`s new pen {复数} This is pen变复数 pen的复数形式是什么` pen 复数pens怎么读 我的英文要复数 英国的复数是什么?要正确的 法国人的复数是什么?要正确的 French的复数是什么?要正确的 It’s his pen.怎么变复数 This is his pen.复数形式 this.is pen变复数句 that is his pen变复数句 this is a pen.改为复数句 That is a pen.(变为复数) that is a pen (变为复数） is that his pen?改为复数 It is my pen.(改为复数形式)