Question

quejarse de (n./v.)Siempre te quejas de todo.You're always complaining about everything.Mi tía siempre se quejaba de su mala suerte.My aunt would always moan about her bad luck.

Accepted Answer

to complain of / about (someone / something / doing something)

Front	quejarse de (n./v.) Siempre te quejas de todo. You're always complaining about everything. Mi tía siempre se quejaba de su mala suerte. My aunt would always moan about her bad luck.
Back	to complain of / about (someone / something / doing something)

De Siempre Quejarse N./V Te Quejas Todo Complaining