parts of speech

例句：

1. 1. Grammar is the study of rules that govern the use of words in a language.
   语法是研究语言中单词使用规则的学问。
2. 2. The teacher explained the parts of speech to the students.
   老师向学生们解释了语法成分。
3. 3. In English, there are six basic parts of speech: nouns, verbs, adjectives, adverbs, pronouns, and conjunctions.
   在英语中，有六个基本语法成分：名词、动词、形容词、副词、代词和连词。