grammar system

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. This grammar system is designed to help learners improve their writing skills.
   这个语法体系旨在帮助学习者提高写作技能。
3. 3. Grammar is an essential part of learning a new language, and it's important to understand the basic rules.
   语法是学习一门新语言的必备部分，理解基本规则很重要。