Not so RE-gular ;)
pris
What is prendre, to take
su
What is savoir, to know how or to know a fact
fait
What is faire, to do or to make?
vu
What is voir, to see?
été
What is être, to be?
mis
What is mettre, to put
dû
What is devoir, to have to, to "must"
dit
What is dire, to tell?
eu
What is avoir, to have?
Vécu
What is vivre, to live?
appris
What is apprendre, to learn
pu
What is pouvoir, to be able
écrit
What is écrire, to write?
ouvert
What is ouvrir, to open?
connu
What is connaître, to know a person or a place?
permis
What is permettre, to permit
voulu
What is vouloir, to wish or to want
lu
What is lire, to read?
bu
What is boire, to drink?
eu
What is avoir, to have?
compris
What is comprendre, to understand
reçu
What recevoir, to receive?
cru
What is croire, to believe?
couru
What is courir, to run?
plu
What is pleuvoir or plaire, to rain or to please?