fly怎么加s

【fly怎么加s】把y变i加es,flies 。
补充内容:
1、单数名词加s: students,apples, bags, trees, books, brothers;
2、以s、x、sh、ch结尾的名词加es: glasses, boxes, brushes, matches;
3、以辅音字母加y结尾的名词,变y为i加es: cities, babies, enemies.