vs 

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"Por siempre jamás" is a phrase which is often translated as "forever and ever", and "para siempre" is a phrase which is often translated as "forever". Learn more about the difference between "por siempre jamás" and "para siempre" below.
por siempre jamás(
pohr
 
syehm
-
preh
 
hah
-
mahs
)
A phrase is a group of words commonly used together (e.g., once upon a time).
phrase
a. forever and ever
Prométeme que nunca me dejarás y que me querrás por siempre jamás.Promise me you'll never leave me and you'll love me forever and ever.
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para siempre(
pah
-
rah
 
syehm
-
preh
)
A phrase is a group of words commonly used together (e.g., once upon a time).
phrase
a. forever
Nada es para siempre.Nothing lasts forever.
b. for good
A word or phrase that is commonly used in conversational speech (e.g., skinny, grandma).
(colloquial)
¿Piensas quedarte allí a vivir para siempre?Are you planning to stay there for good?
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