state grammar

例句：

1. 1. The teacher explained the rules of English grammar to the students.
   老师向学生们解释了英语语法的规则。
2. 2.Grammar is essential for writing clear and concise sentences.
   语法对于写作清晰、简洁的句子至关重要。
3. 3. Students need to learn the basic rules of grammar to improve their writing skills.
   学生需要学习基本的语法规则来提高他们的写作技能。