Sum, esse, fuî, futûrus
 

	Present		Imperfect		Future
	Singular	plural	Singular	plural	Singular	plural
1st	sum	sumus	eram	erâmus	erô	erimus
2nd	es	estis	erâs	erâtis	eris	eritis
3rd	est	sunt	erat	erant	erit	erunt

possum, posse, potuî
 

	Present		Imperfect		Future
	Singular	plural	Singular	plural	Singular	plural
1st	possum	possumus	poteram	poterâmus	poterô	poterimus
2nd	potes	potestis	poterâs	poterâtis	poteris	poteritis
3rd	potest	possunt	poterat	poterant	poterit	poterunt

Completes the meaning of another verb, but not just any ole’ verb, only those in the list below are able to take a complementary infinitive… [as in English, able to, dare to, undertake to, remember to, forget to, be accustomed to, begin to, continue to, cease to, hesitate to, learn to, know how to, fear to …]

• Possum, posse
• Volô, velle
• Audeô, audêre
• Debeô, debêre
• Optô, optâre
• Parô, parâre
• Timeô, timêre