Basic Rules Of Grammar

What do u mean by basic rules? Please be explicit.

Say the right words in the right order.
Make subjects and verbs agree in number.
Use the correct case for all pronouns.
Add "ed" to form the past tense.
Add "s" to form plurals.
Add "'s" to form possessives.
Invert subject and verb in a question.
Don't use a countable singular noun without an article.
Put adjectives in front of the nouns they modify.
Put compliments before adjuncts.
Put a form of "don't" before the verb to negate it.

Those are the basics. There are a lot of exceptions, of course. To understand English grammar well, you need to go very far beyond the basics.

CJ