【正确答案】：
GRAMMATICAL MEANING REFERS TO THAT PART OF THE MEANING OF THE WORD WHICH INDICATES GRAMMATICAL CONCEPT OR RELATIONSHIP. IN THE ABOVE 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.
【题目解析】：语法意义是指词义中表示语法概念或关系的部分。在上面的句子中，“狗”和“猫”是名词，两者都是单数。 在句子中分别用作主语和宾语；“is chasing”是现在进行时中的谓语动词，“the”和“a”是限定词，限制了所指物，指示了编号。