The document discusses the past future perfect continuous tense in Indonesian. It defines the tense as expressing an imagined action or situation that was ongoing at a specific point or period in the past. It provides the formula for forming the tense, which uses the auxiliary verbs "would", "have", and "been" plus the present participle. It notes that the tense generally only applies to dynamic verbs, not stative verbs, since only dynamic verbs can be continuous. Examples are given of positive, negative, and interrogative sentences in the past future perfect continuous tense.