Stop doing something 和 stop to do something 有分別嗎？

Stop doing something (i.e. stop + gerund) 的意思是：停止正在做的事 (stop what one is doing)。在考試尾聲，時間到了，老師會說 stop writing，而不是說 stop to write 。其他例子有： 

Put your pens down and stop writing. 
Stop arguing with me!
I was full so I stopped eating. 
Stop fooling around and start working.  

而 stop to do something (i.e. stop + infinitive) 的意思是：停下正在做的事去做另一件事 (stop whatever one's doing in order to do something else)。例如說： 

I stopped to write down a brilliant idea that crossed my mind.  (= I stopped what I was doing so that I could write down that brilliant idea.) 
We stopped to take some photos.  (= We stopped what we were doing in order to start taking some photos.)