Future

Basic rules

You use the future tenses will-future and going to... 

...when something probably happened 
...when something happens in the future
...when you decided to do something

Deeper explanation

How to make will-future?

The will-future is formed from the help-verb and the infinitive of the verb.

It is used in all forms will + infinitive also with he, she or it.[1]

For example:

positiv:
I will go to toilet.
He/She/It will bake a cake. 

negativ:
I won´t go to toilet.
He/She/It won´t bake a cake.

Questions:
Will you go to toilet?
Will he/she/it bake a cake?
     

How to make going-to future?

Going to-future will be from a form of (is, are, or is), going to and the infinitive  of the verb.
To be (is, are, is) + going to + Infinitive. 

[2]