nounoun derivatives

例句：

1. 1.The noun is the first thing that comes to mind when you think of a particular concept.
   名词是你想到某个特定概念时首先想到的东西。
2. 2. The noun is used to describe a person or thing that has a specific name or identity.
   名词用来描述具有特定名称或身份的人或事物。
3. 3.The noun is often used in conjunction with other words to form phrases or sentences.
   名词经常与其他词语结合形成短语或句子。