From Wiktionary, the free dictionary
sur- + veillier
surveillier
to keep watch over
This verb conjugates as a first-group verb ending in -ier , with a palatal stem. These verbs are conjugated mostly like verbs in -er , but there is an extra i before the e of some endings. The forms that would normally end in *-eill , *-eills , *-eillt are modified to eil , euz , eut . Old French conjugation varies significantly by date and by region. The following conjugation should be treated as a guide.
surveillier
avoir surveillié
en surveillant
gerund of avoir + past participle
surveillant
surveillié
indicative
jo
tu
il
nos
vos
il
simple tenses
present
surveil
surveilles
surveille
surveillons
surveilliez
surveillent
imperfect
surveilloie , surveilleie , surveilloe , surveillieve
surveilloies , surveilleies , surveilloes , surveillieves
surveilloit , surveilleit , surveillot , surveillieve
surveilliiens , surveilliens
surveilliiez , surveilliez
surveilloient , surveilleient , surveilloent , surveillievent
preterite
surveillai
surveillas
surveilla
surveillames
surveillastes
surveillierent
future
surveillerai
surveilleras
surveillera
surveillerons
surveilleroiz , surveillereiz , surveillerez
surveilleront
conditional
surveilleroie , surveillereie
surveilleroies , surveillereies
surveilleroit , surveillereit
surveilleriiens , surveilleriens
surveilleriiez , surveilleriez
surveilleroient , surveillereient
compound tenses
present perfect
present tense of avoir + past participle
pluperfect
imperfect tense of avoir + past participle
past anterior
preterite tense of avoir + past participle
future perfect
future tense of avoir + past participle
conditional perfect
conditional tense of avoir + past participle
subjunctive
que jo
que tu
qu’il
que nos
que vos
qu’il
simple tenses
present
surveil
surveuz
surveut
surveillons
surveilliez
surveillent
imperfect
surveillasse
surveillasses
surveillast
surveillissons , surveillissiens
surveillissoiz , surveillissez , surveillissiez
surveillassent
compound tenses
past
present subjunctive of avoir + past participle
pluperfect
imperfect subjunctive of avoir + past participle
imperative
–
tu
–
nos
vos
–
—
surveille
—
surveillons
surveilliez
—