Future Tense Verbs: 4 Forms and How to Use Them
grammar.yourdictionary.com › grammar › verbsFuture perfect progressive tense is used to express an ongoing action that will be completed at a specific time in the future. The formula is: will have been + present participle - I will have been traveling for 18 hours by then. The difference between this tense and the future progressive tense is that the future progressive tense does not specify an exact date/time. However, the future perfect progressive tense does.