English language has now become a basic tool of survival these days not only does it serve as a link in connecting people of different cultures and nations but also provides different opportunities. Generally speaking we learn grammar because it is the essential building blocks of a language. It tells us how to form our sentences correctly and how and when to use certain words or expressions. We spend the whole life in listening, speaking, reading and writing. So all these things are based on the grammar. Grammar tells us how we should apply the rules for our exact communication. To study grammar is like an exercise for the mind, a form of analysis, a mental exercise similar to chess, crossword puzzles, or Sudoku. Grammar is a means to help us communicate our thoughts clearly, precisely, and with a purpose. Grammar courses and exercises will teach you why certain constructions are incorrect and how to fix them. Whatever the reason you have to learn grammar, you will never regret to have done it.