beforehand
英
/bɪˈfɔːhænd/
美
/bɪˈfɔːrhænd/
adv.
预先,事先;提前,超前
adj.
预先准备好的;提前的,赶在前面的
记忆技巧:before prep.,conj.,&adv.在…之前 + hand n.手
例句
I wish we'd known about it beforehand.
要是我们预先知道这事就好了。
It is reasonable to assume that he knew beforehand that this would happen.
有理由认为他事先就知道会发生这样的事。
How could she tell beforehand that I was going to go out?
她怎么会事先知道我要出去?