i Register
In some senses, be is marked as formal, dated. Watch for register when choosing this word.
ADJ.
alone, antisocial, best, cool, fixed, impolite, lame, lovely
VERB + BE
can't, don't, got, intend, know, place, seat, see
BE + NOUN
an', astrophysicist, day, felley, fro, guy, i'd, king
PREP.
in
ADV.
easily, exactly, maybe, once, sometimes