rąbam, rąbacz, rąba, rąbamy
Yes, this is funny. My Polish grammar is all gone now, but I will nevertheless give you the correct declension of the verb "rąbać".
rąbię, rąbiesz, rąbie, rąbiemy, rąbiecie, rąbią
Trąbić, however, does not follow exactly the same pattern:
trąbię, trąbisz, trąbi, trąbimy, trąbicie, trąbią
Did I say declension? I did not mean it - conjugation of course. :-)