Present Future Tense

Use 1 - "Will" to Express a Voluntary Action
"Will" often suggests that a speaker will do something voluntarily. A voluntary action is one the speaker offers to do for someone else. Often we use "will" to respond to someone else's complaint or request for help.
Examples:
A: I'm really hungry.

B: I'll make some sandwiches.

A: The phone is ringing.

B: I'll get it.
Use 2 - "Will" to Express a Promise
"Will" is usually used in promises.
Examples:
I will call you when I arrive.

I promise I will not tell him about the surprise party.
Use 3 - "Be going to" to Express a Plan
"Be going to" expresses that something is a plan. It expresses the idea that a person intends to do something in the future.
Examples:
He is going to spend his vacation in Hawaii.

I am going to do my homework tomorrow.
Use 4 - "Will" or "Be Going to" to Express a Prediction
Both "will" and "be going to" can express the idea of a general prediction about the future. Predictions are guesses about what might happen in the future. In "prediction" sentences, the subject usually has little control over the future and therefore USES 1-3 do not apply. In the following examples there is no difference in meaning.
Examples:
The year 2000 will be a very interesting year.
The year 2000 is going to be a very interesting year.

Forming negative sentences in simple future
While forming a negative sentence in simple future tense,
before all subjects won’t /will not auxiliary verbs are used.
Examples:
I won't study.

She will not go to Ankara.

Time Expressions
in the future
tomorrow
two days later
next week
soon
(2013+)