I don't know what you mean vs I don't understand

Quand utiliser chacun en anglais, avec le sens, le registre et des exemples.

I don't know what you mean

Top 1000 (très courant)

I don't understand

Top 2000 (courant)
Le plus courant: I don't know what you mean
 I don't know what you meanI don't understand
Prononciation🇬🇧 //aɪ dəʊnt nəʊ wɒt jʊ miːn//🇺🇸 //aɪ doʊnt noʊ wʌt ju miin//🇬🇧 //aɪ dəʊnt ˌʌndəˈstænd//🇺🇸 //aɪ doʊnt ˌʌndərˈstænd//
SensJe ne comprends pas ce que tu dis.I don't understand what you're saying.Je ne saisis pas.I don't get it.
ExempleWhen you said that, I thought for a moment and replied, 'I don't know what you mean.'When the teacher explained the math problem, I said, 'I don't understand.'
RegistreNeutreNeutre
FréquenceTop 1000 (très courant)Top 2000 (courant)
Collocationsexpress confusion, clarify a statement, ask for explanationdon't understand anything, don't understand why, don't understand the instructions
Antonymes-understand, comprehend
Erreurs fréquentesUsing 'mean' incorrectly as a noun instead of a verb., Confusing 'know' with 'understand'., Not using it to clarify misunderstandings.Saying 'I not understand' instead of 'I don't understand'., Using 'I no understand' which is incorrect in English., Confusing it with 'I understand not', which sounds overly formal.
Notes d'usageCette phrase est utilisée pour exprimer la confusion ou le manque de compréhension. Elle convient aussi bien dans des contextes informels que formels. Évitez de l'utiliser dans des situations où vous devez paraître plus compétent ou affirmé.This phrase is used to express confusion or lack of understanding. It's appropriate in both casual and formal contexts. Avoid using it in situations where you need to seem more knowledgeable or assertive.Tu peux utiliser cette phrase quand tu as besoin de plus d'explications. Ça passe bien dans la plupart des situations, mais évite-la si c'est très formel.Use this phrase when you need clarification. It's appropriate in most situations but avoid it in very formal contexts.

Vois-le dans de vrais extraits

I don't know what you mean
I don't understand

Questions fréquentes : I don't know what you mean vs I don't understand

Quelle est la différence entre I don't know what you mean et I don't understand ?

I don't know what you mean: I don't understand what you're saying. I don't understand: I don't get it.

Lequel est le plus courant : I don't know what you mean et I don't understand ?

I don't know what you mean est le plus courant dans l'anglais de tous les jours.

Peux-tu montrer un exemple de chacun ?

I don't know what you mean: When you said that, I thought for a moment and replied, 'I don't know what you mean.' I don't understand: When the teacher explained the math problem, I said, 'I don't understand.'

Puis-je utiliser I don't know what you mean et I don't understand de façon interchangeable ?

Pas toujours. I don't know what you mean et I don't understand sont proches et se recoupent parfois, mais elles diffèrent par le registre, la fréquence et l'usage, donc remplacer l'une par l'autre peut changer le sens ou le ton. Regarde les différences ci-dessus avant de substituer.