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"Llueve" is a form of "llover", an impersonal verb which is often translated as "to rain". "Hace mal tiempo" is a phrase which is often translated as "the weather is bad". Learn more about the difference between "llueve" and "hace mal tiempo" below.
An impersonal verb is a verb with no apparent subject (e.g., Llueve en España.).
An intransitive verb is one that does not require a direct object (e.g., The man sneezed.).
a. to rain down on (figurative)
Me llovieron todo tipo de problemas.All sorts of problems rained down on me.
A phrase is a group of words commonly used together (e.g., once upon a time).
1. (general)
a. the weather is bad
Prefiero no salir cuando hace mal tiempo.I prefer not to go out when the weather is bad.