How to use "Going to" to talk about the future

When we use going in a phrase to talk about the future, the form consists of three elements: 

S: Subject. 

be: The verb to be conjugated to match the subject.

V: the infinitive of the main verb

Affirmative

S + be going to + V

He’s going to buy this house.

Negative

S + be + not + going to + V

She isn’t going to play tennis this weekend.

Interrogative

Be + S + going to + V

Is Peter going to buy a new car soon?

Negative interrogative

Be not + S + going to + V

Aren't you going to stay at the office until your report is finished?

USE

Used to indicate future events that suggest a very close connection with the present.

Time doesn't matter, later than now, but attitude is the fact that depends on something in the present situation that we know about it. Go is mainly used to refer to our plans and intentions or to make predictions based on current evidence. In American English, going to is often shortened to gonna, but it is never written that way.

How to use "going to" versus "will".