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1、Adj .是形容词，是adj的缩写。

2、Adv .是副词，是英语中副词词类的简称，全称是副词。

3、扩展数据

4、Adjective (abbreviation of adjective) is an adjective: tall, short, fat, thin, long, handsome, beautiful, beautiful, slow, fast, weak and so on.

5、Adverbs are adverb words: now, then, often, always, usually, next, last day, already, etc.

6、v是动词，全称动词，指用来表示动作或状态的词。

7、Such words include saying, watching, walking, listening, laughing, taking, flying, running, singing, drinking, knocking, sitting, shouting, staring, and so on.

8、n是名词，全称是名词，表示一个人、一件事、一个地方或抽象概念的名称。

9、Such words are student, apple, school, desk, pencil, pen, banana, glass and so on.