Use of 'en' and 'y'

Question

Possible Duplicate:
Quelle est la différence entre « en » et « y », utilisés en tant que pronoms ?

I have a question about the use of 'en' and 'y' together.

Imagine I would like to say:

• Have you just arrived from Paris?
• No, I'm going there next month.

How it would be using the pronoun in the second phrase?

• Tu viens de arriver de Paris?
• Non, j'(en/y) vais le mois prochain.

Answer 1

As a quick rule of thumb, (I mean, for people not having read this question) :

1) y replaces à (to)

2) en replaces de (from)

• Je vais à Paris --> J'y vais.

• Je viens de Paris --> J'en viens.

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So, to answer more directly :

Tu viens d'arriver de Paris?

Non, j'y vais le mois prochain.