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"Ago" is an adverb which is often translated as "hace", and "since" is a preposition which is often translated as "desde". Learn more about the difference between "ago" and "since" below.
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since(
sihns
)A preposition is a word that indicates the relationship between a noun and another word (e.g., He ran through the door.).
a. desde
I have been working for this company since 2010.Llevo trabajando en esta empresa desde 2010.
A conjunction is a word that connects words, phrases, clauses, or sentences (e.g., The cat and the dog slept.).
2. (reason)
a. ya que
Since I'm the only one watching TV, pass me the remote.Ya que soy la única que está viendo tele, pásame el control remoto.
b. como
Since you don't like pizza, can I have your portion?Como no te gusta la pizza, ¿puedo tomarme tu porción?
c. puesto que (formal)
We didn't visit her since it was very late.No la visitamos puesto que era muy tarde.
An adverb is a word that describes a verb, an adjective, or other adverbs (e.g., to run quickly, very tired).
4. (after that)
a. desde entonces
I met her for dinner, but I haven't seen her since.Cené con ella, pero no la he visto desde entonces.
5. (long ago)
