I don't understand vs Now i don't know

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

I don't understand

Top 2000 (comum)

Now i don't know

Top 3000 (comum)
Mais comum: I don't understand
 I don't understandNow i don't know
Pronúncia🇬🇧 //aɪ dəʊnt ˌʌndəˈstænd//🇺🇸 //aɪ doʊnt ˌʌndərˈstænd//🇬🇧 //naʊ aɪ dəʊnt nəʊ//🇺🇸 //naʊ aɪ doʊnt noʊ//
SignificadoNão entendi.I don't get it.I am confused or unsure right now.
ExemploWhen the teacher explained the math problem, I said, 'I don't understand.'I planned everything, but now I don't know what to do.
RegistroNeutroNeutro
Quão comumTop 2000 (comum)Top 3000 (comum)
Colocaçõesdon't understand anything, don't understand why, don't understand the instructionsdon't know what, don't know how, don't know why, now I feel confused
Antônimosunderstand, comprehendNow I know, I understand now
Erros comunsSaying '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.Using in a very formal situation, Confusing with 'I don't know now', which implies a change in knowledge, Omitting the subject when speaking
Notas de usoUse esta frase quando precisar de esclarecimento. É apropriada na maioria das situações, mas evite-a em contextos muito formais.Use this phrase when you need clarification. It's appropriate in most situations but avoid it in very formal contexts.Used when you are expressing confusion or lack of information. Common in informal conversations but appropriate in neutral contexts as well.

Veja em clipes reais

I don't understand
Now i don't know

Perguntas frequentes: I don't understand vs Now i don't know

Qual é a diferença entre I don't understand e Now i don't know?

I don't understand: I don't get it. Now i don't know: I am confused or unsure right now.

Qual é mais comum: I don't understand e Now i don't know?

I don't understand é a mais comum no inglês do dia a dia.

Pode mostrar um exemplo de cada?

I don't understand: When the teacher explained the math problem, I said, 'I don't understand.' Now i don't know: I planned everything, but now I don't know what to do.

Posso usar I don't understand e Now i don't know de forma intercambiável?

Nem sempre. I don't understand e Now i don't know 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.