had been quacking

Past perfect progressive conjugation of quack. There are other translations for this conjugation.

quack

graznar

el graznido

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INTRANSITIVE VERB

(to make the sound of a duck)-graznar

Synonyms for quack

NOUN

(sound ducks make)-el graznido

Synonyms for quack

NOUN

(impostor)-el charlatán

Synonyms for quack

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