I don't think so vs Not that I know of

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

I don't think so

Top 2000 (courant)

Not that I know of

Top 5000 (assez courant)
Le plus courant: I don't think so
 I don't think soNot that I know of
Prononciation🇬🇧 //aɪ dəʊnt θɪŋk səʊ//🇺🇸 //aɪ doʊnt θɪŋk soʊ//🇬🇧 //nɒt ðæt aɪ nəʊ ɒv//🇺🇸 //nɑt ðæt aɪ noʊ ʌv//
SensI disagree with that idea.I don't have that information.
ExempleDo you think we should cancel the trip?Is there a new project starting next month? Not that I know of.
RegistreNeutreNeutre
FréquenceTop 2000 (courant)Top 5000 (assez courant)
CollocationsI don’t think so, I don’t believe so, I don’t feel that waynot that I know of, as far as I know, to my knowledge
AntonymesI think so, Yes, Definitely-
Erreurs fréquentesUsing it too aggressively in a polite conversation., Confusing it with 'I think not' which is more formal., Forgetting to tone down the response in sensitive discussions.Using it in a context where certainty is required., Confusing it with 'not to my knowledge' as it feels less formal., Neglecting to use it when unsure if something is true.
Notes d'usageUse this phrase in discussions to express your disagreement. It's neutral and can fit various contexts, but avoid in very formal settings.Use this phrase when responding to questions about information you are uncertain about. It’s polite and straightforward, suitable for both formal and casual contexts.

Questions fréquentes : I don't think so vs Not that I know of

Quelle est la différence entre I don't think so et Not that I know of ?

I don't think so: I disagree with that idea. Not that I know of: I don't have that information.

Lequel est le plus courant : I don't think so et Not that I know of ?

I don't think so est le plus courant dans l'anglais de tous les jours.

Peux-tu montrer un exemple de chacun ?

I don't think so: Do you think we should cancel the trip? Not that I know of: Is there a new project starting next month? Not that I know of.

Puis-je utiliser I don't think so et Not that I know of de façon interchangeable ?

Pas toujours. I don't think so et Not that I know of 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.

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