Language itself is one of the great inventions in human history, as great as the discovery of fire, the use of electricity, the invention of computer，etc.
    Thanks to language，we can talk，argue and sing ,and then a civilized，wonderful world birthed .However，I would prefer to see a beautiful sentence as a kind of art ,like the flaming sun rising in the morning ;the pure world covered by snow in winter ,quiet and peaceful ; a curvaceous girl ,fascinatingly.
    Language is made up by sentences ，words and some special symbols make up a sentence . But if we put some words and some symbols together randomly ，that will not a sentence .So there must be some rules to organize these words ,that is grammar.