J'ai une grande valise noire et une petite valise verte.
Mais j'en ai besoin d'une autre.
Why do we need 'en' in there?
En

addr
August 31, 2010

Marie-Claire-Riviere
September 14, 2010
Bonjour addr,
Thanks for your post!
In these phrases, "en" replaces "valise" to avoid repeating the word again.
I hope this helps!
All the best for your French course! :D