Will and Going to

Simple Future has two different forms in English: "will" and "be going to."

Will

FORM ---> will + verb in the infinitive

Examples:

afirmative : You will help him later.
interrogative : Will you help him later?
negative : You will not help him later.

USE

Instant decisions ---> Ok, I'll see you on Friday
Predictions based on what we think or --->Tomorrow will be sunny and hot
Promises and offers---> Don't worry, I have time, I' ll go and buy some food for you.

Be Going To

FORM---> am/is/are + going to + verb in the infinitive

Examples:

afirmative : You are going to meet Jane tonight.
interrogative : Are you going to meet Jane tonight?
negative : You are not going to meet Jane tonight.

USE

Future plans and intentions ---> I'm going to buy a new mobile phone next week.
Predictions based on what we can see at that moment ---> Look at that car! it is going to crash into the lamp post