beforehand
🇺🇸
/bɪˈfɔːrhænd/
🇬🇧
/bɪˈfɔːhænd/
adverb
R
at an earlier time; before something happens
Please let me know beforehand if you cannot come to the meeting.
如果您不能来参加会议，请提前告诉我。
translation
预先