Prepositions de temps - Cabinet Action

La regle fondamentale AT / ON / IN

Memorisez cette regle du plus precis au plus large : AT = heure precise, ON = jour/date, IN = mois/saison/annee.

Preposition	Usage	Exemples
AT	Heure precise, moment	at 7 am, at noon, at night, at Christmas, at the weekend
ON	Jour, date	on Monday, on July 14th, on my birthday, on Christmas Day
IN	Mois, saison, annee	in May, in summer, in 2026, in the 21st century, in the morning

Exception a connaitre : on dit in the morning / afternoon / evening mais at night.

Since vs For : la difference cruciale

Preposition	Indique	Exemple
SINCE	Point de depart (depuis quand)	I have lived here since 2020.
FOR	Duree (pendant combien)	I have lived here for 6 years.

Les deux s'utilisent avec le present perfect. Since 3 years est incorrect : il faut for 3 years (duree) ou since 2023 (point).

Autres prepositions temporelles

Preposition	Sens	Exemple
during	pendant (+ evenement)	during the meeting
while	pendant que (+ verbe)	while I was cooking
until / till	jusqu'a	until Friday
by	au plus tard (deadline)	by 5 pm
before / after	avant / apres	before lunch, after class
from ... to	de ... a	from Monday to Friday

Quiz : choisissez la bonne preposition

The meeting is ____ 3 pm. (at)
My birthday is ____ May. (in)
We meet ____ Monday. (on)
She has worked here ____ 2018. (since)
I studied English ____ 5 years. (for)
Please finish this ____ Friday. (by)
We stayed ____ midnight. (until)
He slept ____ the movie. (during)

Methode memoire : associez chaque preposition a une image — AT = un point sur une horloge, ON = une case dans un calendrier, IN = une page de calendrier complete.