Try their best 还是Try their bests?

问题描述:

Try their best 还是Try their bests?

try their best

try one's best 是固定用法,其中best不会因为人称的单复数而作变化的。只有记牢就行了。

try their best.这里best相当于抽象名词

try their best. 他们尽力做到最好。

try their best
这个best是副词,修饰try的,并不是their的宾语!
所以……
而且,好像也没有bests这种用法吧?!