ago, agere, egi, actus - do, act, drive, lead
amo, amare, amavi, amatus - love, like
audeo, audere, ausus - dare
audio, audire, audivi, auditus - hear, listen to
cupio, cupere, cupivi, cupitus - desire, wish
debeo, debere, debui, debitus - owe; ought (+ inf.)
-ne - untranslateable, signals a yes/no question
possum, posse, potui - can, be able
quis, quid - who?, what?
soleo, solere, solitus - be accustomed 
video, videre, vidi, visus - see; (like teneo the passive voice may have a linking meaning: seem)
volo, velle, volui - want, wish, be willing