boy的复数形式为什么要加s

因为boy是以元音字母加y结尾，直接加s。

boys：n.男孩;男青年;年少的儿子;做某工作的男孩(或小伙子);伙计

相关介绍

例句：

Most of the boys went straight into the services.

多数男生直接去服兵役了。

There is an equal number of boys and girls in the class.

这个班男女生人数相等。

Boys are often more inhibited than girls about discussing their problems.

男孩子往往不如女孩子敢于谈论自己的问题。

It is significant that girls generally do better in examinations than boys.

很明显，女生的考试成绩一般比男生的好。