为什么a pair of sunglasses后面的谓语动词要用复数形式?RT.

a pair of gloves a pair of shoes 为什么glove加s,shoes不加s a new pair of shoes 还是a pair of new shoes?为什么? a pair of trousers前为什么要加pair of呢?可省略吗 a pair of shoes a pair of couple a pair of a pair of Need a pair of There [ ]a pair of shoes A is Bare 为什么 He wants to buy a (pair) of trousers为什么要选pair a pair of sports shoes中的sports为什么加s he often wears a pair of glasses为什么不用with A pair of blue pants{}go with a pair of brown shoes请说明为什么,并翻译, a pair of gloves还是a pair of glove 是a pair of glass 还是a pair of glasses a pair of skate还是a pair of skates the pair of glassesThe glasses are not for Lucy. 为什么要用复数 a pair of glasses 呢 a pair of glasses复数