We will be together for a long long time.
如果是给外国人解释：
我们：we
要在：will be，future tense because it means we must／we should，it's not just for now
一起：together
好久好久：literally：goodly long，s...
We will be together for a long long time.
如果是给外国人解释：
我们：we
要在：will be，future tense because it means we must／we should，it's not just for now
一起：together
好久好久：literally：goodly long，s...