Be going to

1.- We form with be going to like this:

be going + to + Infinitive


It going to snow

Positive

I am

He/she/it is ---------------> going to leave

We/you/they are

Negative

I am
He/she/it is -------------------> not going to leave
We/you/they are

Questions

Am I
Is he/she/it --------------------> going to start?
Are we/you/they

2.- Note that we usually use the short form of be (I'm, he/she/it's, we/you/they're):

They're going to leave
He's going to spend a week by the sea.

3.- The negative short form is I'm not going to:

I'm not going to play tennis today.

With he,she and it, there are also two negative short forms:

He/she/it isn't going to come.
He/she/it's not going to come.

With you, we and they, there are also two negative short forms:

You/we/they aren't going to come.
You/we/they're not going to come.

4.- We use be going to for the future. We use it:

----> to talk about things we have decided to do in the future:

A: What are you going to do tomorrow?

B: I'm going to visit Paul in Brighton

A: Are you going to drive?

B: No, I'm going to take the train.


----> to predict the future, using information we know now:

Look at that blue sky! It's going to be hot.

I've eaten too much. I'm going to be ill.

Look at the time. It's two o' clock. They aren't going to come now.