Question

can any body tell what is grammer

Answer 1

HELLO friend here is your answer.
In linguistics, grammar is the set of structural rules governing the composition of clauses, phrases, and words in any given natural language. .
i hope it will help you.
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Answer 2

the whole system and a structure of the language or of languages in general, usually taken as consisting of syntax and morphology and sometimes also phonology and semantics.

like :- Adjective,noun, passive and active voice, prepositions etc...