When we learn a new word, it is not enough to look at its definition in the dictionary. We need to learn how it is spelled and pronounced as well. We also need to know its usage, how it is used in a sentence. To do that, we need to know whether it's a noun or an adjective or a verb that can be conjugated; in other words, we need to know its part of speech. If we are to use the word correctly, a basic level of grammar knowledge is crucial.
