This is a regular verb. It follows the conjugation pattern of the verb hablar.
PresentPresente
Mi vecino se queja del ruido todos los días.
My neighbor complains about the noise every day.
ImperfectPretérito imperfecto
Los clientes se quejaban del servicio lento.
The customers complained about the slow service.
Negative ImperativeImperativo negativo
Por favor, no te quejes tanto del clima.
Please don't complain so much about the weather.