Réponse :

bonjour

expressions qui indiquent la durée :

-for two years

- for three hours

- for ten seconds

- for centuries

- for a long time

expression qui précisent le point de départ :

- since Christmas

- since two o'clock

- since 1492

- since May

- since the holidays

- since WWII

- since the Middle Ages

- since she had an accident

- since they got married

voila:)