"It is not so much a merit to know English as it is a shame not to know it."

Why is it that a boy enjoys taking a bicycle apart? Possibly one reason is that some day it may be convenient to know how the parts go together. Now a boy's sentences, like his bicycle, sometimes need repairs; and if he is to do his own repairing, he must know how the parts of the sentence go together. Should he have occasion to make bicycles, he would need to study with the utmost patience the construction of such machines. He is bound to make sentences, and the sensible way to learn how to make them is to see how the best writers have made them.

The study of the forms and the constructions of words is called Grammar.

Grammar deals with inflection and syntax. Inflection is a change in the form of a word to show its construction. Syntax treats of the constructions of words in the sentence.