作为名词时可数.
有个关于它的绕口令:
I thought a thought. But the thought I thought wasn't the thought I thought I thought. If the thought I thought had Been the thought I thought I thought, I wouldn't have thought so much.
我想了一个想法.但是我想的那个想法不是我想我想的想法.如果我想的那个想法就是我想我想的想法,我也不会想那么多了.