帮忙看一下这句话有无语法错误.

问题描述:

帮忙看一下这句话有无语法错误.
After he graduated from school,he enrolled in army.
错了的话怎么该?

应该再graduated前面加had吧,我觉得这里需要标明时间是在enrolled in army之前,因为前面用到了after ,应该用过去完成时