1. Simple Future has two different forms in English: "will" and "be going to." Both "will" and "be going to" refer to a specific time in the future.
1.1. Examples:
1.1.1. You will help him later.
1.1.2. You are going to meet Jane tonight.
2. FORM Future Simple with Will
2.1. we use "will" to respond to someone else's complaint or request for help. We also use "will" when we request that someone help us or volunteer to do something for us. Similarly, we use "will not" or "won't" when we refuse to voluntarily do something.
2.1.1. Examples
2.1.1.1. I will send you the information when I get it.
2.1.1.2. I won't do all the housework myself!
2.1.1.3. Will you help me move this heavy table?
3. FORM Future Simple with Be going to
3.1. "Be going to" expresses that something is a plan. It expresses the idea that a person intends to do something in the future. It does not matter whether the plan is realistic or not.
3.1.1. Examples
3.1.1.1. He is going to spend his vacation in Hawaii.
3.1.1.2. She is not going to spend her vacation in Hawaii.
3.1.1.3. When are we going to meet each other tonight?
4. Future Perfect has two different forms: "will have done" and "be going to have done." Unlike Simple Future forms, Future Perfect forms are usually interchangeable.
4.1. Example
4.1.1. Luis will have studied Biology by tomorrow
4.1.2. I am going to have worked
5. FORM Future Perfect with "Will"
5.1. [will have + past participle]
5.1.1. Example
5.1.1.1. You will have perfected your English by the time you come back from the U.S.
5.1.1.2. Will you have perfected your English by the time you come back from the U.S.?
5.1.1.3. You will not have perfected your English by the time you come back from the U.S.
6. FORM Future Perfect with "Be Going To"
6.1. [am/is/are + going to have + past participle]
6.1.1. Example
6.1.1.1. You are going to have perfected your English by the time you come back from the U.S.
6.1.1.2. Are you going to have perfected your English by the time you come back from the U.S.?
6.1.1.3. You are not going to have perfected your English by the time you come back from the U.S.