一、含义不同
1.drop in on
释义: 拜访某人。
2.drop in at
释义:拜访某地。
二、用法不同
1.drop in on
用法:drop in on多指在计划之外或事先未打招呼的偶然,on表地点时,指某物与另一物表面相接触,或与某地方接壤等。
2.drop in at
用法:drop in at顺便访问,也可指参观,at表地点时,指空间位置上的某一点。
1、I thought I'd drop in on you while I was passing.
我曾想路过时顺便来看看你。
2、It's improper to drop in on him so casually.
这样冒冒失失去找他可不好。
3、My neighbor would drop in on me from time to time.
邻居们时不时到我家串串门。
1、I usually drop in at his place on my way home.
我回家时,通常顺便到他那里看看。
2、I'd like to drop in at Mr Sun on the way to school.
在去学校的路上,我想顺道拜访一下孙先生。
3、Could I drop in at your house after the concert.
我可不可以在音乐会后去你家拜访。