The auxiliary verb phrases will be, or would be precede the progressive form of the verb. The future perfect tense shows action that will be completed at a certain time in the future. The auxiliary verb phrases will have, would have, or will have been precede the past participle form of the verb. The future prefect progressive tense shows continuing actions that will be completed at a certain time in the future. The verb phrases will have been, would have been, or shall have been precede the progressive form of the verb.