Only working hard and improving more is the key to success.

题目

Only working hard and improving more is the key to success.
这个里面WORK为什么加ING,是当名词用吗
补充问一下,NOLY这里是定语吧

答案

working hard and improving more 是动名词作主语.work hard ,improve 是动词,不能做主语.only 是副词,作状语,强调主语.副词只能作状语.定语需要形容词、相当于形容词的短语（形容词短语）或者相当于形容词的句子（...