grammatist

例句：

1. 1. He is a renowned grammatist who has written many books on grammar.
   他是一位著名的语法学家，写了许多关于语法的书。
2. 2. Grammars are essential tools for teaching English as a second language.
   语法是教授英语作为第二语言的必备工具。
3. 3. The grammatist's work is crucial in the development of language learning materials.
   语法学家的工作对于语言学习材料的发展和至关重要。