1. ir + a + infinitive
Just as you say “going” + an infinitive in English, to say what you are going to do, in Spanish you use a form of the verb ir + a + an infinitive to express the same thing.

2. Let’s review the forms of ir
yo voy
nosotros/as vamos
tú vas
vosotros/as vais él
ella va
Ud.
ellos
ellas van
Uds.

3. And what is an infinitive?
An infinitive is any verb that is not conjugated. You can tell that a verb is an infinitive because it ends in –ar, -er, or –ir. Some examples are... jugar comer hablar montar ir patinar

4. Now let’s practice using ir + a + infinitive
Let’s write a sentence to say... Pedro is going to run in the park.
Pedro va a
correr
en el parque.
First, use a form of ir. You can tell which form to use by looking at the subject of the sentence.
Next, add a.
Now write the second verb in the infinitive.

5. Here are some more examples...
Voy a jugar al tenis hoy. I am going to play tennis today. ¿Tú vas a jugar al golf esta tarde? Are you going to play golf this afternoon? Mis amigas van a ir de cámping mañana. My friends are going to go camping tomorrow.