The correct answer is "have, had, would have, must have, are, is, will, must". This is because all of these words can be used in the sentence to indicate different tenses and modalities. "Have" and "had" are used for present and past perfect tenses, "would have" is used for conditional tense, "must have" is used for deduction, "are", "is", and "will" are used for present, present continuous, and future tenses respectively, and "must" is used for obligation.