"en" et "y"

Question

Bonjour,  Pourquoi « Va-t-en » mais pas « Vas-en » , et « Vas-y » mais pas « Va-t-y » ?Merci d'avance.

Céline Pickard · Accepted Answer

Bonjour Alex,
Take a look here for "vas-y":
Using French adverbial pronoun "y" in affirmative commands in the imperative mood (L'Impératif) in French
And take a look here for "va-t'en":
Va-t'en
I hope this is helpful.
Bonne journée !

Anne Davies · Answer

These are two different verbs, aller and s’en aller. The 2nd person singular imperative of aller is va (dropping the s like a regular -er verb) which for euphony becomes vas in vas-y.

The equivalent in s’en aller is va-t’en. Va-t’en no longer has two adjacent vowels, so the s at the end of va isn’t needed.

Alex H. · Answer

Merci beaucoup Anne D.  Ce que vous dites est très clair.