vs
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"Si" is a form of "si", a conjunction which is often translated as "if". "Hace frío" is a phrase which is often translated as "it's cold". Learn more about the difference between "si" and "hace frío" below.
si(
see
)A conjunction is a word that connects words, phrases, clauses, or sentences (e.g., The cat and the dog slept.).
A masculine noun is used with masculine articles and adjectives (e.g., el hombre guapo, el sol amarillo).
hace frío(
ah
-
seh
free
-
oh
)A phrase is a group of words commonly used together (e.g., once upon a time).