Going to

Going to: present continuous

We use the present continuous form of the verb go + preposition to + noun phrase to talk about movement in relation to a place or a person in the present:

Are youGOING TO  Maggie’s party tonight?

I’m GOING TO THE SHOPS . Do you want anything?

Going to: future

We can use a present form of be + going to + the base form of a main verb to talk about the future. We use it for plans and intentions, predictions and commands:

I’m GOING TO BUY a new car next week. (plan or intention)

You’re not GOING TO DO all this in an hour. There’s just too much to do. (prediction: the speaker can see how much there is to do)

I’m telling you, you’re GOING TO DO  it. You don’t have a choice. (command)

Was going to

We use a past form of be + going to when we talk about a plan we had that may have changed.