好

   “好” is often used as an optative verb with the connotation of “可以”. Placed before the verb in the second, it explains the purpose of the action in the first clause, for example,
他们想快点儿把东西卸完，好让司机回城去。
明天别忘了带词典，做翻译练习的时候好用。
今天大家早点儿睡觉，明天好早点儿起来。
你把手机号告诉我， 有事的时候我好给你打电话。