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QUICK ANSWER
"Don't know" is a form of "don't know", a phrase which is often translated as "no sé". "I'm sorry" is a phrase which is often translated as "perdón". Learn more about the difference between "I'm sorry" and "don't know" below.
I'm sorry(
aym
saw
-
ri
)A phrase is a group of words commonly used together (e.g., once upon a time).
b. disculpa (informal)
A word or phrase used to refer to the second person informal “tú” by their conjugation or implied context (e.g., How are you?).
I'm sorry I am running late.Disculpa la demora.
c. perdona (informal)
A word or phrase used to refer to the second person informal “tú” by their conjugation or implied context (e.g., How are you?).
I stained your carpet! I'm sorry!¡Manché tu alfombra! ¡Perdona!
d. discúlpame (informal)
A word or phrase used to refer to the second person informal “tú” by their conjugation or implied context (e.g., How are you?).
I'm sorry if I offended you.Discúlpame si te ofendí.
e. perdóname (informal)
A word or phrase used to refer to the second person informal “tú” by their conjugation or implied context (e.g., How are you?).
I didn't realize this was your seat. I'm sorry.No me di cuenta de que este era tu asiento. Perdóname.
a. lo siento
I couldn't come to class because my uncle died. - I'm very sorry.No pude venir a clase porque murió mi tío. - Lo siento mucho.
b. no direct translation
This refers to an idiomatic word or phrase for which there is no word-for-word translation.
I'm sorry for your loss.Mi más sentido pésame.
I'm sorry to hear about your dad. I hope he gets better soon.Siento lo de tu padre. Espero que se recupere pronto.
b. cómo
I'm tired. - I'm sorry? - I said I'm tired.Estoy cansado. - ¿Cómo? - Dije que estoy cansado.
b. disculpa (informal)
A word or phrase used to refer to the second person informal “tú” by their conjugation or implied context (e.g., How are you?).
I'm sorry, do you know where the station is?Disculpa, ¿sabes dónde queda la estación?
a. un momento
This band sucks. - I'm sorry? I love them!Esta banda es una porquería. - ¡Un momento! ¡A mí me encantan!
b. qué dices (informal)
A word or phrase used to refer to the second person informal “tú” by their conjugation or implied context (e.g., How are you?).
Today's chemistry class was awesome. - I'm sorry? Nobody understood anything!La clase de química de hoy estuvo genial. - ¿Qué dices? ¡No se entendió nada!
don't know(
dont
no
)A phrase is a group of words commonly used together (e.g., once upon a time).
1. (general)
a. no sé
What's the score? - Don't know, don't care.¿Cuál es el resultado del partido? - No sé y no me importa.
b. ni idea
Do you think Mayra will win the election? - Don't know. I hope so.¿Crees que gane la elección Mayra? - Ni idea. Espero que sí.
c. sabe Dios
Do you think Amanda will like the meal I prepared? - Don't know. I've never met Amanda.¿Crees que a Amanda le guste la comida que preparé? - Sabe Dios. Nunca he conocido a Amanda.
d. a saber
How many tickets did you sell? - Don't know. I didn't keep track.¿Cuántas entradas vendiste? - A saber. No llevé ningún registro.
