I think the imperative tense (l’impératif) is perhaps the easiest to master in French. As usual, there are the spoiler irregulars, the most irregular of which is aller. I mean:
Va Vas (-y)
In addition to the expected irregular conjugation involving the 1st person and 2nd person plurals:
Allons (-y) Allez (-y)
*Wait, I don’t even like beer.