noise名词变形

noisy是noise的形容词，noise是名词，例如，It is noisy that they don't listen to the teacher.在英语里类似这种单词变形很多，例如，possibility名词，possible形容词，development名词，develop动词，government名词，govern动词，等等，都是通过词缀变化来达到词性变化的。