Usages of quejarse
El cliente nunca deja de quejarse del servicio.
The customer never stops complaining about the service.
Ustedes dejan de mentir y empiezan a quejarse.
You all stop lying and start to complain.
El actor se queja como si el ruido le molestara.
The actor complains as if the noise bothered him.
Mi amigo vive quejándose por hipocondríaco.
My friend is constantly complaining because he is a hypochondriac.
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