The word y replaces a place in a sentence. It often means there but sometimes shows up in French where we'd otherwise leave out the word there in English. Just like en, lui, les, and leur, y comes before the verb.
À quelle heure tu vas au restaurant ? J’y vais vers huit heures.
What time are you going to the restaurant? I’m going around 8 o’clock.
L’été dernier Marc est allé en France, et il y retourne l’été prochain.
Last summer Marc went to France, and he’s going back next summer.
And there are a couple French expressions with y that always mean Let’s go!
On y va !
Let’s go!
Allons‑y !
Let’s go!
You can use pas by itself (without ne!) in some phrases, like pas moi and pas maintenant.
Alice aime voyager en avion, mais pas moi.
Alice like traveling by plane, but not me.
Nous pouvons y aller demain, mais pas aujourd’hui.
We can rent a car to go there next week, but not today.
Je vais t’aider ce soir, mais pas maintenant.
I’m going to help you tonight, but not right now.
To invite someone you know well to do something, use Ça te dit de… ? When speaking to more than one person, use Ça vous dit de… ?
Ça te dit d’aller au musée cet après‑midi ?
Do you want to go to the museum this afternoon?
Ça te dit de dîner au restaurant ce soir ?
Do you want to go out to eat tonight?
Les enfants, ça vous dit d’aller au parc ?
Children, do you (all) want to go to the park?