be
was / were --> p.s.
am / are / is --> pr.s.
been --> p.p.
bear
bore --> p.s.
borne --> p.p.
beat
beat --> p.s.
beaten --> p.p.
become
became --> p.s.
become --> p.p.
begin
began --> p.s.
begun --> p.p.
bet
bet --> p.s.
bet --> p.p.
bleed
bled --> p.s.
bled --> p.p.
blow
blew --> p.s.
blown --> p.p.