When we are talking or writing about actions (verbs) that have not taken place, yet we are looking to form the verb in the future tense. The most common form of the future tense is placing the word "will" before the verb in question. This form of future tense use is referred to as simple future tense. If you have an event taking place in the future that will be ongoing you would use the future progressive tense. This is usually seen by placing the words "will be" before the verb. The future perfect tense is used when we know something will be completed in the future, but we just are not sure when. The words “will have” are usually found in front of these words. Alternatively, when you know of an ongoing action that at a specific time will complete, you would use the future perfect progressive tense.
In most circumstances when we are talking about the future tense many times the verb will have -ing added to it. You will find the need to focus all four of the different forms of future tense in your writing often. Make sure to just take your time and see which version would make it the clearest for your audience.