in front of, in the front of
	 
	(1) in front of 相对某物体的外部而言,说明某人或某物体在某个地方的外部的前边。反义是:behind。如: 
	There are some trees in front of the classroom.教室的外面有一棵树。 
	 
	(2) in the front of 想对于空间而言,说明人或某物在某空间的最前面,
	意为“在……前部”,方位较具体。如: 
	The teacher’s desk is in the front of the classroom.
	老师的讲台是在教室里的前方。 
	 
	(3) before 意味“在……的前面”,可用作介词、连词、副词,
	反义是after。before多用于指时间,但也可表位置。如: 
	Tuesday comes before Wednesday.星期三之前是星期二。
	She sits before me.她坐在我前面。
         
 
  
