我觉得应该用虚拟语气比较好他还没死 所以是对将来的虚拟 if he died i were to go with him (他死了我也将随他而去也就是一起死拉）if he died i wouldn't live (alone)
If he is dead, I do not live up
I won't live if he dies.
When he died,I won't be alive.
