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"Multas" is a form of "multar", a transitive verb which is often translated as "to fine". "Tasas" is a form of "tasar", a transitive verb which is often translated as "to value". Learn more about the difference between "multas" and "tasas" below.
multar()
A transitive verb is a verb that requires a direct object (e.g., I bought a book.).
tasar()
A transitive verb is a verb that requires a direct object (e.g., I bought a book.).