This is the structure of language and the rules that go with it.

What is the word.

Syntax

Explanation:

The term syntax has ancient Greek origin meaning arranging/ordering together.

Syntax in linguistics is a set rules and processes governing the ways in which words are arranged (structure) to make sentences, clauses and phrases. Syntax is also called proper order of words in a phrase, clause or sentence.

Examples:

He goes school, he go to school, they gone to school, We school going, all have incorrect syntax.

He goes to school, he went to school, they have gone to school, we are going to school, all have correct syntax.