1. WILL
1.1. USES
1.1.1. To talk about future facts
1.1.2. At the moment of making a decision
1.2. STRUCTURE
1.2.1. Sub+will+verb+comp/ Sub+will not+verb+comp
1.2.2. will+sub+verb+comp?
1.2.2.1. EXAMPLE
1.2.2.1.1. I will pass the exam
2. GOING TO
2.1. USES
2.1.1. To talk about a future prediction based on evidence in the present situation
2.1.2. To talk about plans and intentions
2.2. STRUCTURE
2.2.1. Sub+verb to be+going to+verb +comp/Sub+verb to be+not going to+verb +comp
2.2.2. Sub+verb to be+going to+verb +comp?
2.2.2.1. EXAMPLE
2.2.2.1.1. I am going to see you tomorrow
3. WILL BE DOING
3.1. USES
3.1.1. To talk of something that is in progress at a particular time in the future
3.1.2. Is used to describe an action that will take place in the future which can be specified or not
3.2. STRUCTURE
3.2.1. Sub+will be+verb ing/Sub+will not be +verb ing
3.2.2. Will+sub+be+verb ing
3.3. EXAMPLE
3.3.1. I will be walking
3.3.2. will you be studying tomorrow?