Usage Examples
[Present Indicative] Me quejo cuando el servicio es malo. → I complain when the service is bad.
[Present Perfect] Él se ha quejado del ruido de los vecinos. → He has complained about the noise from the neighbors.
[Imperfect Indicative] Ella siempre se quejaba por la comida del colegio. → She always used to complain about the school food.
[Pluperfect Indicative] Ya nos habíamos quejado varias veces antes de que nos escucharan. → We had already complained several times before they listened to us.
[Preterite] Se quejó amargamente de su mala suerte. → He complained bitterly about his bad luck.
[Preterite Anterior] Apenas se hubo quejado, el gerente apareció. → As soon as he had complained, the manager appeared.
[Future] Me quejaré a la dirección si esto sigue así. → I will complain to management if this continues like this.
[Future Perfect] Para mañana ya se habrán quejado todos los clientes. → By tomorrow all the customers will have already complained.
[Conditional] Me quejaría si pensara que serviría de algo. → I would complain if I thought it would do any good.
[Conditional Perfect] Se habría quejado si hubiera sabido la verdad. → He would have complained if he had known the truth.