Infinitive
Gerund
en sostenant
Participles
| Present | sostenant |
| Past | sostenu |
Indicative
Present
| 1st sing. | sostieng; sostien |
| 2nd sing. | sostiens |
| 3rd sing. | sostient |
| 1st plur. | sostenons |
| 2nd plur. | sostenez |
| 3rd plur. | sostienent |
Imperfect
| 1st sing. | sostenoie; sosteneie |
| 2nd sing. | sostenoies; sosteneies |
| 3rd sing. | sostenoit; sosteneit |
| 1st plur. | sosteniiens; sosteniens |
| 2nd plur. | sosteniiez; sosteniez |
| 3rd plur. | sostenoient; sosteneient |
Preterite
| 1st sing. | sostin |
| 2nd sing. | sostenis |
| 3rd sing. | sostint |
| 1st plur. | sostenimes |
| 2nd plur. | sostenistes |
| 3rd plur. | sostindrent; sostinrent |
Future
| 1st sing. | sostendrai |
| 2nd sing. | sostendras |
| 3rd sing. | sostendra |
| 1st plur. | sostendrons |
| 2nd plur. | sostendroiz; sostendreiz; sostendrez |
| 3rd plur. | sostendront |
Conditional
| 1st sing. | sostendroie; sostendreie |
| 2nd sing. | sostendroies; sostendreies |
| 3rd sing. | sostendroit; sostendreit |
| 1st plur. | sostendriiens; sostendriens |
| 2nd plur. | sostendriiez; sostendriez |
| 3rd plur. | sostendroient; sostendreient |
Subjunctive
Present
| 1st sing. | sostiegne |
| 2nd sing. | sostiegnes |
| 3rd sing. | sostiegne |
| 1st plur. | sostiegniens; sostiegnons |
| 2nd plur. | sostiegniez |
| 3rd plur. | sostiegnent |
Imperfect
| 1st sing. | sostenisse |
| 2nd sing. | sostenisses |
| 3rd sing. | sostenist |
| 1st plur. | sostenissons; sostenissiens |
| 2nd plur. | sostenissoiz; sostenissez; sostenissiez |
| 3rd plur. | sostenissent |
Imperative
| 2nd sing. | sostien |
| 1st plur. | sostenons |
| 2nd plur. | sostenez |
Verbs conjugated like sostenir
detenir,
devenir,
sovenir,
sustenir,
couvenir,
soustenir,
covenir,
obtenir,
apertenir,
meintenir,
apartenir,
entrevenir,
souvenir,
sostenir,
astenir,
avenir,
retenir,
contretenir,
abstenir,
resovenir, etc. (List truncated at 20 verbs)
Etymology
Sample Sentences
Cognates
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