General Sentence Structure:
* Grammar - This is the broadest term, encompassing all rules of language, including sentence structure.
* Syntax - This focuses specifically on the arrangement of words in a sentence.
* Sentence Structure - This is a more direct term for the rules of how to build a sentence.
Specific Sentence Rules:
* Parts of speech - These are categories of words (e.g., noun, verb, adjective) that have specific grammatical functions.
* Subject-verb agreement - The rule that requires the verb in a sentence to agree with the subject in number.
* Punctuation - This refers to the rules for using punctuation marks like periods, commas, and semicolons.
* Word order - This refers to the specific arrangement of words within a sentence in a particular language.
Other:
* Grammatical rules
* Language rules
* Sentence mechanics
The best term to use will depend on the context and the specific type of sentence rules you are discussing.