Answer :
Final answer:
Using adverbs of frequency in sentences helps express the regularity of actions.
Explanation:
Two times best completes the sentence 'El perro vive en la casa y él es muy sucio. Por eso tenemos que limpiar y pasar la aspiradora'.
Frequency adverbs like 'dos veces' indicate how often an action occurs in a sentence.
Using adverbs of frequency helps convey the regularity of actions in a language.
Learn more about Adverbs of frequency here:
https://brainly.com/question/38021065