南京1-6年级英语知识点分类本身就是复数的词
本身就是复数的词
眼镜glasses; 耳机earphones; 鞋shoes;裤子trousers等词本身是复数。
如：My glasses were on the chair just now.
但如果表示这双，这副，一双的时候用单数
如：There is a pair of chopsticks on the plate. This pair of earphones is for you.