be beforehand with

基本解释

When you go on a journey, it is a good thing to be beforehand with your packing.
当你出门旅行的时候，最好提前把行李整理好。
A written application must be filed beforehand with the Chinese Foreign Ministry for approval to import wireless transmitter-receivers and related equipment.
运进无线电收发信机及其器材，必须事先以书面申请报经中国外交部批准。
www.mfa.gov.cn
In case it is necessary for a vessel to transport any cargo with uncertainty whether apt to cause pollution damage, an assessment shall be made beforehand in accordance with the relevant regulations.
需要船舶装运污染危害性不明的货物，应当按照有关规定事先进行评估。

Is the President going to be meeting with any of the vets privately beforehand?
WHITEHOUSE: Press Briefing