I had to think of a way of preventing him from following me around all morning.

问题描述:

I had to think of a way of preventing him from following me around all morning.
为什么用介词from

这句话意思是我必须要想一个办法来阻止他一个早上都跟着我.
prevent Sb.form doing sth.意思是阻止某人做某事
例:Pull the line taut to prevent it form knotting up.
把线拉紧,以免打结.