in front of是指其中一方在另一方的外部，二者相互独立。on the front of指的是在前的，靠前的。on表示在……的表面上。front含义：adj.前面的；前部的；在前的；n.正面；前面。
in front of例句It's there, right in front of you!
在那儿，就在你前面！
There's a bus stop in front of the house.
房子前面有一个公共汽车站。
We had our picture taken in front of the hotel.
我们在旅馆前照了相。
They ate everything that was set in front of them.
他们把放在面前的东西都吃光了。
on the front of例句One man sat in an armchair, and the other sat on the front of the desk
一个男人坐在扶手椅里，另一个坐在桌子前面。
Her father used to perch her on the front of his bike.
她爸爸过去常让她坐在自行车前梁上。
The story was on the front pages of all the tabloids.
所有小报都在头版报道了这件事。
Write your name on the front cover of the exercise book.
在练习本的封面上写上你的名字。
