Notes on Irregular Verbs:

Irregular verbs do not follow the rules of any of the four conjugations; therefore they are called irregular. These verbs need to be memorized in all of their tense conjugations and principle parts.

Sum, esse, fui, futurus – to be

Imperative: es, este

Present Tense
	Singular	Plural
1	sum	sumus
2	es	estis
3	est	sunt
Imperfect Tense
	Singular	Plural
1	eram	eramus
2	eras	eratis
3	erat	erant

Possum, posse, potui – to be able, can

Imperative: ~

Present Tense
	Singular	Plural
1	possum	possumus
2	potes	potestis
3	potest	possunt
Imperfect Tense
	Singular	Plural
1	poteram	poteramus
2	poteras	poteratis
3	poterat	poterant

Volo, velle, volui – to wish, want, be willing

Imperative: ~

Present Tense
	Singular	Plural
1	volo	volumus
2	vis	vultis
3	vult	volunt
Imperfect Tense
	Singular	Plural
1	volebam	volebamus
2	volebas	volebatis
3	volebat	volebant

Nolo, nolle, nolui – to be unwilling, not wish

Imperative: noli, nolite

Present Tense
	Singular	Plural
1	Nolo	Nolumus
2	Non vis	Non vultis
3	Non vult	nolunt
Imperfect Tense
	Singular	Plural
1	Nolebam	Nolebamus
2	Nolebas	Nolebatis
3	nolebant	nolebant

Fero, ferre, tuli – to bring, carry

Imperative: fer, ferte

Present Tense
	Singular	Plural
1	Fero	Ferimus
2	Fers	Fertis
3	fert	ferunt
Imperfect Tense
	Singular	Plural
1	Ferebam	Ferebamus
2	Ferebas	Ferebatis
3	ferebat	ferebant

Eo, ire, ivi/ii, itum – to go

Imperative: i, ite

Present Tense
	Singular	Plural
1	Eo	imus
2	Is	istis
3	it	eunt
Imperfect Tense
	Singular	Plural
1	Ibam	ibamus
2	Ibas	ibatis
3	ibat	ibant