Make some verbs! Make sure that you know your person markers :)

habitō, habitāre are called PRINICIPAL PARTS.
HABITŌ is first person singular present: ‘I live’
HABITĀRE is the INFINITIVE. FINIS means ‘end, boundary, limit’. habitō is ‘bound’--it has to be ‘I LIVE’. Even if you want it to be, habitō can’t mean anything else. It can’t mean ‘we live’ or ‘y’all live.’ HABITĀRE ‘TO LIVE’ is not bound. It can become anything just by adding the right person marker.

The principal parts are the most important parts of the verb because they give us the stem of the verb: Take the INFINITIVE, DROP THE -RE at the end, and add the person marker you want.

So:
HABITĀRE → HABITĀ- (= STEM) + _____

Stem + -S = HABITĀS = ‘YOU LIVE’

Stem + -MUS = HABITĀMUS = ‘WE LIVE’