Hence vs That's why

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

Hence

Formel Top 3000 (courant) B2 adverb

That's why

Top 1000 (très courant)

Le plus formel: Hence Le plus courant: That's why

	Hence	That's why
Prononciation	🇬🇧 /["/hens/"]/ 🇺🇸 /["/hens/"]/	🇬🇧 //ðæts waɪ// 🇺🇸 //ðæts waɪ//
Sens	pour cette raison for that reason	C'est la raison. This is the reason.
Exemple	We suspect they are trying to hide something, hence the need for an independent inquiry.	The project was delayed. That's why we need an extension.
Registre	Formel	Neutre
Fréquence	Top 3000 (courant)	Top 1000 (très courant)
Niveau CEFR	B2	-
Nature grammaticale	adverb
Collocations	hence the need, henceforth, hence it follows	that's why I, that's why we, that's why she, that's why they, that's why he
Antonymes	therefore, thus	-
Erreurs fréquentes	Using 'hence' incorrectly as a standalone sentence., Confusing 'hence' with 'therefore' when they have slightly different usages., Forgetting to use a comma before 'hence' when it starts a new clause.	'That's why' is sometimes confused with 'that's because', which has a slightly different use., Learners often forget to follow 'that's why' with a clear explanation., Some may use 'that's why' in overly formal contexts, where a more precise term is needed.
Notes d'usage	Utilisé à l'écrit ou dans un langage soutenu pour expliquer des conséquences ou des raisons. Ça peut sembler un peu trop formel dans une conversation décontractée. Used in writing or formal speech to explain outcomes or reasons. It may feel too formal in casual conversations.	Utilisez 'c'est pourquoi' pour expliquer ou justifier une déclaration. C'est approprié pour la conversation et l'écriture informelle, mais peut être moins formel dans les essais. Use 'that's why' to explain or justify a statement. It's suitable for conversation and informal writing, but may be less formal in essays.

Vois-le dans de vrais extraits

Hence the bravery.

Hence

That's why I gave it to you.

Sherlock › S1 E1

Because I'm desperate, that's why.

'Cause it ain't there, 'cause storing dead niggers ain't my fuckin' business, that's why !

That's why I gave it to you.

Sherlock › S1 E1

Because I'm desperate, that's why.

That's why

Questions fréquentes : Hence vs That's why

Quelle est la différence entre Hence et That's why ?

Hence: for that reason That's why: This is the reason.

Lequel est le plus formel : Hence et That's why ?

Hence est le plus formel de tous.

Lequel est le plus courant : Hence et That's why ?

That's why est le plus courant dans l'anglais de tous les jours.

Peux-tu montrer un exemple de chacun ?

Hence: We suspect they are trying to hide something, hence the need for an independent inquiry. That's why: The project was delayed. That's why we need an extension.

Puis-je utiliser Hence et That's why de façon interchangeable ?

Pas toujours. Hence et That's why 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.