beforehand

副詞

1. 1

   事先、預先

   You should let the host know beforehand if you can't attend.

   如果你不能出席，應該事先告知主辦人。

2. 2

   提早、提前

   We arrived half an hour beforehand to set up the chairs.

   我們提早半小時到，把椅子擺好。