conjugation rules and endings for the first group verbs.
Concentrer is conjugated the same way that verbs that end in :
-er. First group verbs always end with
-er as their infinitive. Endings of first group verbs are regular.
Note : Although endings are perfectly regular, spelling changes occur in the stems of verbs in
-cer,
-ger,
-yer,
-eter,
-eler,
-é-consonne(s)-er,
-e-consonne-er, verb
envoyer and similar verbs.
Concentrer verb is conjugated in female form and in reflexive form. Be careful, the past participle of compound tenses must agree with the subject.
Concentrer verb is conjugated in negative form. The placement of the negative adverb follow the following rules:
- the adverb
« ne » is placed after the pronoun and before the verb.
- in simple tenses, the adverbs (
« ne ...pas »,
« ne...plus »,
« ne...jamais », etc...) surround the verb
concentrer.
- in compound tenses or in ive voice, the negative adverbs surround the auxiliary.