.on,in,at表示地点方位的区别:
①在表示地点时,指“在……之上(与表面接触)” “靠近、接壤”及“在左右边”都用on.
There is an English-Chinese dictionary and two grammar books on the big desk.那张大写字台上有一本英汉词典和两本语法书.
Korea lies on the northeast of China. 朝鲜位于中国东北方.
②表示“在……里面”(即物体内部),“在……中间”(即middle前)都用in.
例 :
Jim turned the key in the lock and opened the door. 吉姆把钥匙插在锁孔里,转动一下,打开了门.