时间上:before 可用在时间状语从句中,例如:He has left the room before I came in.位置上:in front of 在……前面,是指两个独立的物体,例如:The post office is in front of the shop. in the front of在……的前部,是指一个东西在另外一个东西的前部,例如:He sits in the front of the classroom.祝你学习愉快!
before 英[bɪˈfɔ:(r)] 美[bɪˈfɔr,-ˈfor] prep. 在…之前; 先于,优于; 当着…的面; 与其…; conj. 在…之前; 在…以前; 比…早些; 与其…; adv. 先前,从前; 在前,在前方; [例句]When you do get through, you've got to say your piece quickly before you get cutoff.电话接通后,你最好在断线之前尽快把话说完。[其他] 形近词: afore 望采纳,谢谢!