太多了,简单举几个例子吧
形容词变名词：
-ness: useful->usefulness
-ity: active->activity
动词变名词：
-tion: act->action 太多了,简单举几个例子吧
形容词变名词：
-ness: useful->usefulness
-ity: active->activity
动词变名词：
-tion: act->action