如果只是指“鞋子”不加where is my shoes? 我的鞋子在哪?I wear my old shoes every day.我每天都穿那双旧鞋如果是指"一双鞋"就可以加He bought a pair of shoes.他买了一双皮鞋.I want a pair of shoes for my son。我要为我儿子买一双鞋
a pair of shoes.a pair of scissors成双的东西都要加a pair of, 希望我的答案帮到你 谢谢