So readng chapter 1 and 2 of our "understanding grammar" book, I thought it was very interesting that there are different definitions of grammar- and not only definitions but also different kinds of grammar. I always thought grammar is just about the rules of correct sentence formation, which in my newly gained knowledge now represents the prescriptive grammar. However grammar seems to be a lot more flexible than that. Descriptive grammar "describes the way people speak" ( Kolln, 2006, p.4) and so it is not only about setting rules for language but also about receiving input from the language. Therefore grammar changes with language changing constantly. This is what makes a language alive, the change that it undergoes.