There are several dozen regular French verbs that end in -re, sometimes called -dre verbs.
To conjugate them in PRESENT
remove the infinitive ending (-re)
and then add one of the following verb endings:
je -s
tu -s
il -
elle -
nous -ons
vous -ez
ils -ent
elles -ent
Par exemple…
attendre (to wait)
j'attends (I wait / I am waiting)
tu attends
il attend
elle attend
nous attendons
vous attendez
ils attendent
elles attendent
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Note: in a negative sentence:
We do not wait = Nous n'attendons pas
To conjugate the verbs ending in -RE in the PASSÉ COMPOSÉ (a past tense)
remove the infinitive ending (-re)
and then add -u (you call this part of the verb the PAST PARTICIPLE)
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Remember that the PASSÉ COMPOSÉ has 2 PARTS (part a + part b):
part a. the auxiliary AVOIR or ÊTRE conjugated in the present tense
+
part b. the past participle of the verb
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Par exemple…
vendre (to sell)
j'ai vendu (I sold)
tu as vendu
il a vendu
elle a vendu
nous avons vendu
vous avez vendu
ils ont vendu
elles ont vendu
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Note: in a negative sentence:
I did not sell = Je n'ai pas vendu