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"Since then" is an adverb which is often translated as "desde entonces", and "from then on" is a phrase which is also often translated as "desde entonces". Learn more about the difference between "since then" and "from then on" below.
since then(
sihns
 
thehn
)
An adverb is a word that describes a verb, an adjective, or other adverbs (e.g., to run quickly, very tired).
adverb
a. desde entonces
I quit smoking six years ago, and I've been much healthier since then.Dejé de fumar hace seis años y, desde entonces, he estado mucho más sano.
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from then on(
fruhm
 
thehn
 
an
)
A phrase is a group of words commonly used together (e.g., once upon a time).
phrase
a. desde entonces
They fell out at university and, from then on, never spoke again.Se pelearon en la universidad y desde entonces no volvieron a hablar.
b. a partir de ese momento
From then on, you will no longer be able to access your account.A partir de ese momento, ya no podrás acceder a tu cuenta.
c. de ahí en adelante
I decided to go self-employed eight years ago and have had steady work from then on.Decidí hacerme autónoma hace ocho años y de ahí en adelante nunca me faltó trabajo.
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