sum, esse, fu, futrus "to be"

Indicative

sum is the only truly irregular form.

 

 

Present
SingularPlural
sumsummus
esestis
estsunt

 

 

 

The stem for the imperfect indicative is "er-". Then add the personal endings. Think of the way the imperfect is done in a regular conjugation (bam, bas, bat, etc.).

 

 

 

Imperfect
SingularPlural
eramermus
ersertis
eraterant

 

 

 

 

Future
SingularPlural
erererimus
eriseritis
eriterunt

 

 

 

 

Perfect
SingularPlural
fufuimus
fuistfuistis
fuitfurunt

 

 

 

 

Pluperfect
SingularPlural
fueramfuermus
fuersfuertis
fueratfuerant

 

 

 

 

Future Perfect
SingularPlural
fuerfuerimus
fuerisfueritis
fueritfuerunt

 

 

Subjunctive

The root of this form is "si-".Then add the personal endings.

 

 

Present
SingularPlural
simsmus
ssstis
sitsint

 

 

 

 

Imperfect
SingularPlural
essemessmus
esssesstis
essetessent

 

 

 

 

Perfect
SingularPlural
fuerimfuermus
fuersfuertis
fueritfuerint

 

 

 

 

Pluperfect
SingularPlural
fuissemfuissmus
fuisssfuisstis
fuissetfuissent

 

 

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