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"Cuan" is a form of "cuan", an adverb which is often translated as "as". "Durar" is an intransitive verb which is often translated as "to last". Learn more about the difference between "cuan" and "durar" below.
cuan()
An adverb is a word that describes a verb, an adjective, or other adverbs (e.g., to run quickly, very tired).
durar()
An intransitive verb is one that does not require a direct object (e.g., The man sneezed.).
1. (to go on)
