Tom is the same age as me.为什么不用has而用is呢?

Tom is the same age as me.中间的is 其实是is of 具有的意思.
一般 某种东西或人 具有某种特征 用be of,不用have
比如：他中等高度,He is of midium height.
这张地图很重要.The map is of great importance.
记得采纳一个答案,否则我们拿不了分,升不了级的,