因为词性不同,这里需要一个名词,故用difficulty.
而difficult是形容词,形容词要么用在BE动词后,要么放在名词前,要记牢.
例:
this is a difficult question.名词前.
this question is difficult.BE动词后
因为词性不同,这里需要一个名词,故用difficulty.
而difficult是形容词,形容词要么用在BE动词后,要么放在名词前,要记牢.
例:
this is a difficult question.名词前.
this question is difficult.BE动词后