【正确答案】：
GRAMMATICAL MEANINGS REFER TO THAT PART OF MEANING OF THE WORD WHICH INDICATES GRAMMATICAL CONCEPT OR RELATIONSHIPS SUCH AS PART OF SPEECH OF WORDS, SINGULAR OR PLURAL MEANING OF NOUNS, TENSE MEANING OF VERBS AND INFLECTIONAL FORMS. WORDS IN GROUP 1 HAVE THE SAME TENSE MEANING. THEY ALL SHOW THE PAST TENSE. "TOOK" IS THE PAST TENSE OF "TAKE". "TAUGHT" IS THE PAST TENSE OF "TEACH". "BECAME" IS THE PAST TENSE OF "BECOME". WORDS IN GROUP 2 HAVE DIFFERENT GRAMMATICAL MEANINGS. "HAVE" IS THE PRESENT TENSE; "HAS" IS THE THIRD SINGULAR VERB OF "HAVE"; "HAD" IS THE PAST TENSE OF "HAVE"; “HAD” IS THE PAST PERFECT TENSE OF "HAVE"; "HAVING" IS THE PRESENT PROGRESSIVE OF “HAVE”.
【题目解析】：语法意义是指词的意义的一部分，它表示词的词性、名词的单数或复数意义、动词的时态意义和屈折形式等语法概念或关系。第一组中的单词有相同的时态意义。它们都显示的是过去时态。”Took"是take的过去式。"Taught”是“teach”的过去式。"Became"是"become"的过去式。第二组中的单词有不同的语法意义。”Have“是一般现在时态，”has”是”have”的第三人称单数动词，”had”是“have”的过去时态，”had”是”have”的过去完成时态，“having”是“have”的现在进行时态。