ok i will do the first one and follow the same pattern for the rest
all of these are IR verbs- so you drop the ir and add something different depending if its yo, nosotros, tu, (etc.)
yo- o
tu- es
ella/el/ud.- e
nosotros- imos
ellas/ellos/uds./ - en
so for the first one the conjugation for yo would be "describrio"