Take the following sentence as an example to explain grammatical

Take the following sentence as an example to explain grammatical meaning The dog is chasing a cat.
【正确答案】：Grammatical meaning refers to that part of the meaning of the word which indicates grammatical concept or relationship. Grammatical meaning of a word becomes important only when it is used in actual context. In the sentence, the word dog and cat are nouns and both are singular used as subject and object in the sentence respectively; is chasing is the predicate verb in present continuous tense, and the and a are determiners, restricting the referent and indicating number.