<em>Grammar</em> is the <em>system and structure of language </em>composed by <u>clauses</u>, <u>phrases</u>, and <u>words </u>of any language. It's a <em>linguistic tool</em> that shows us what are the rules of correct sentences. There are various subfields that involve grammar, such as <em>syntax, phonetics, </em><u><em>semantics</em></u><em>, pragmatics, and morphology</em>.
Most of us learn the rules of our native language unconsciously by observing others, usually during childhood. If we want to learn another language when we grow up we will have to study explicit information about this language. So, we can say that <em>language is the cognitive information underlying language use.</em>
Given that semantics is the subfield of grammar that studies meaning, and linguistics is the study of a language, we can positively say that the name of the set of rules that make language systematic is Grammar. The rules are not arbitrary. <u>We can not place a string of words together without syntax, morphology, semantics, and phonetics because</u> <em>the meaning of these words can be open to interpretation and easily confused.</em>
