from latin sum. the past participle fu is from the stem of the future participle futurus, and the stem used in the potential mood err- is from the stem of the future tense er- in latin.
this verb conjugates like: être
infinitive: être
past participle: fu
present participle: essanz
| present | imperfect | past | historic | ante present | ante past | ||
|---|---|---|---|---|---|---|---|
| jo | so | essai | fuvi | fuvai | ao fu | aüvi fu | |
| to | es | essais | fuvis | fuvais | as fu | aüvis fu | |
| ille | e | essait | fuvit | fuvait | a fu | aüvit fu | |
| nos | som | essaim | fuvim | fuvaim | avam fu | aüvim fu | |
| vos | êts | essaiz | fuviz | fuvaiz | avaz fu | aüviz fu | |
| illes | sont | essaint | fuvront | fuvaint | ont fu | aüvront fu |
| future | conditional | ante future | ante conditional | |||
|---|---|---|---|---|---|---|
| jo | erro | errai | arro fu | arrai fu | ||
| to | erras | errais | arras fu | arrais fu | ||
| ille | erra | errait | arra fu | arrait fu | ||
| nos | erram | erraim | arram fu | arraim fu | ||
| vos | erraz | erraiz | arraz fu | arraiz fu | ||
| illes | errant | erraint | arrant fu | arraint fu |
| present | imperfect | ante present | ||
|---|---|---|---|---|
| jo | sue | fusse | aye fu | |
| to | sues | fusses | ayes fu | |
| ille | sue | fusse | aye fu | |
| nos | suem | fussem | ayem fu | |
| vos | suez | fussez | ayez fu | |
| illes | suent | fussent | ayent fu |
| present | past | subjunctive | ||
|---|---|---|---|---|
| jo | essor | fuvor | suer | |
| to | essars | fuvars | suers | |
| ille | essart | fuvart | suert | |
| nos | essamor | fuvamor | suemor | |
| vos | essazor | fuvazor | suezor | |
| illes | essantor | fuvantor | suentor |
| present | ||
|---|---|---|
| jo | sue | |
| to | sues | |
| ille | sue | |
| nos | suem | |
| vos | suez | |
| illes | suent |