i (call) you when i get to beijing tomorrow.

题目

i (call) you when i get to beijing tomorrow.
i (call) you when i get to beijing tomorrow.
为什么填will call?

答案

主将从现原则,主句用一般将来时（will,be going to等）,时间状语从句用一般现在时表将来.
这里的主句是I will call you.
时间状语是:
when i get to beijing tomorrow