Hence vs That's why

Quando usar cada um em inglês, com significado, registro e exemplos.

Hence

Formal Top 3000 (comum) B2 adverb

That's why

Top 1000 (muito comum)

Mais formal: Hence Mais comum: That's why

	Hence	That's why
Pronúncia	🇬🇧 /["/hens/"]/ 🇺🇸 /["/hens/"]/	🇬🇧 //ðæts waɪ// 🇺🇸 //ðæts waɪ//
Significado	por essa razão for that reason	Este é o motivo. This is the reason.
Exemplo	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.
Registro	Formal	Neutro
Quão comum	Top 3000 (comum)	Top 1000 (muito comum)
Nível CEFR	B2	-
Classe gramatical	adverb
Colocações	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
Antônimos	therefore, thus	-
Erros comuns	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.
Notas de uso	Usado na escrita ou em discursos formais para explicar resultados ou razões. Pode soar formal demais em conversas casuais. Used in writing or formal speech to explain outcomes or reasons. It may feel too formal in casual conversations.	Use 'é por isso que' para explicar ou justificar uma afirmação. É adequado para conversas e escrita informal, mas pode ser menos formal em redações. 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.

Veja em clipes reais

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

Perguntas frequentes: Hence vs That's why

Qual é a diferença entre Hence e That's why?

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

Qual é mais formal: Hence e That's why?

Hence é a mais formal entre elas.

Qual é mais comum: Hence e That's why?

That's why é a mais comum no inglês do dia a dia.

Pode mostrar um exemplo de cada?

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.

Posso usar Hence e That's why de forma intercambiável?

Nem sempre. Hence e That's why são relacionadas e às vezes se sobrepõem, mas diferem em registro, frequência e uso, então trocar uma pela outra pode mudar o sentido ou o tom. Veja as diferenças acima antes de substituir.