Épaissir is a french second group verb. So it follow the regular conjugation pattern of the second group like:
conjugation rules and endings for the second group verbs.
Épaissir is conjugated the same way that verbs that end in :
-ir. The prototypical verb for the second conjugation is
finir. The conjugation is, marked by the vowel
i and the infix
-iss- in the indicative present and imperfect.
Épaissir verb is conjugated in female form and in reflexive form. Be careful, the past participle of compound tenses must agree with the subject.
Épaissir is conjugated in interro-negative form. The interro-negative form being obtained by inversion of the subject, the placement of the negative adverb follow the same rules as in negative form, giving the following rules:
- in interro-negative form, the adverb
« ne » is always placed first if the subject is a pronoun.
- in simple tenses, the adverbs (
« ne ...pas »,
« ne...plus »,
« ne...jamais », etc...) surround the verb
épaissir and the inverted subject pronoun.
- in compound tenses or in ive voice, the negative adverbs surround the auxiliary and the inverted subject pronoun.
For sound reasons, like in interrogative form, an euphonious
« t » is added to the pronoun of the third person:
« il »,
« elle »,
« on »,
« ils »,
« elles » except when the verb ends with
« t » or
« d »:
« n'épaissira-t-elle pas ">« n'aura-t-elle pas épaissi ? ».
Finally, the interrogative form does not exist in subjunctive and imperative.