how long

de quelle durée, combien de temps

S’emploie pour demander la durée d’un événement, d’un séjour ou d’une période.

En anglais simple : Used to ask about the length of an event, stay, or period of time.

• How long is the film?
• How long was your holiday?
• Could you tell me how long the meeting will be?

Comment l'utiliser : how long is/are something? (How long is the lesson?); how long are you here for? (How long are you here for this time?)

Expressions courantes : how long is something, how long a stay

de quelle longueur

S’emploie pour demander la distance entre les deux extrémités de quelque chose.

En anglais simple : Used to ask about the distance from one end of something to the other.

• How long is this rope?
• Do you know how long the tunnel is?
• How long were the pieces you cut?

Comment l'utiliser : how long is/are something? (How long is the bridge?)

Synonymes : what length

Expressions courantes : how long is something, how long a rope

combien de temps, depuis combien de temps

S’emploie pour demander combien de temps dure une action ou une situation, ou depuis quand elle continue.

En anglais simple : Used to ask how much time an action or situation lasts.

• How long did you wait?
• How long have they lived here?
• Do you know how long the battery will last?

Comment l'utiliser : how long + auxiliary + subject + verb? (How long have you worked here?); how long does it take to do something? (How long does it take to walk home?)

Synonymes : for how much time

Expressions courantes : how long to wait, how long it takes