wife的复数是什么?

wife的复数形式是什么? life,wife,knife的复数是什么? wife的复数形式 knife,wife,wolf,body,baby的复数形式是什么? knife,wife,thief的复数 wife和roof的复数形式? wife,study,dormitory,knife,dish,American,half的复数分别是什么? wife的对应词是什么? wife有复数吗? house wife复数形式 wife的复数和half的复数,还有hero的复数 He introduced us his wife的句子结构是怎样的us ,his wife是什么成分