question n. v
There is no question about his success.
此句中的question是不可数名词,意为怀疑,疑问,这是其最常见的用法。另外它还有其它的用法,如:
①Id like to question you on your views about the housing problem. (此句中的question作及物动词,意为问(某人)问题。)
②His success is out of question.(out of question意为没问题,办得到的。)
③Watching the football match here seems to be out of the question.(out of the question意为不可能的,办不到的。)