翻译：我和他同岁. 是 My age is the same as his.还是him?为什么

因该是 his .因为是 your age 和 his age 作比较
这句话相当于 My age is the same as his age.
再问： 为什么老师说是him？可我觉得是his，但好像我错了，不知道为什么
再答： 我还是坚持是his. 这句话还可以翻译成: We are the same age. 你可以再和老师探讨。