名词

1. 语法;文法
Grammar is the ways that words can be put together in order to make sentences.

2. 文法；语言的运用
Someone's grammar is the way in which they obey or do not obey the rules of grammar when they write or speak.

3. 语法书
A grammar is a book that describes the rules of a language.

4. 语法理论；语法学
A particular grammar is a particular theory that is intended to explain the rules of a language.

1. the branch of linguistics that deals with syntax and morphology (and sometimes also deals with semantics)