That's why vs Therefore

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

That's why

Top 1000 (muito comum)

Therefore

Formal Top 2000 (comum) B1 adverb

Mais formal: Therefore Mais comum: That's why

	That's why	Therefore
Pronúncia	🇬🇧 //ðæts waɪ// 🇺🇸 //ðæts waɪ//	🇬🇧 /["/ˈðeəfɔː(r)/"]/ 🇺🇸 /["/ˈðerfɔːr/"]/
Significado	Este é o motivo. This is the reason.	For that reason; as a result.
Exemplo	The project was delayed. That's why we need an extension.	He's only 17 and therefore not eligible to vote.
Registro	Neutro	Formal
Quão comum	Top 1000 (muito comum)	Top 2000 (comum)
Nível CEFR	-	B1
Classe gramatical		adverb
Colocações	that's why I, that's why we, that's why she, that's why they, that's why he	therefore concluded, therefore it follows, therefore we can, therefore you should, therefore the result
Antônimos	-	however, nevertheless, nonetheless
Erros comuns	'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.	'Therefore' is sometimes confused with 'therefor', which has a different meaning., Learners may use 'therefore' to start a sentence in informal contexts, which can sound awkward., 'Therefore' may be incorrectly placed in a sentence away from the cause or condition.
Notas de uso	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.	Use 'therefore' to connect ideas in formal writing or speech. It’s less common in everyday conversation and can sound stiff. Avoid it in casual contexts.

Veja em clipes reais

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: That's why vs Therefore

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

That's why: This is the reason. Therefore: For that reason; as a result.

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

Therefore é a mais formal entre elas.

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

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

Pode mostrar um exemplo de cada?

That's why: The project was delayed. That's why we need an extension. Therefore: He's only 17 and therefore not eligible to vote.

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

Nem sempre. That's why e Therefore 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.