Spanish language Q&A Forum

iHola!

Could you please clarify the point:

No se marcha porque está cansado (No se marcha y la causa es que está cansado)

No se marcha porque esté cansado, sino porque se ha enfadado (Se marcha y la causa no es que está cansado)

I've come upon a sentence:

No vino porque no quisiera, sino porque no pudo (The translation says: He did not come not because he didn't want, but because he could not) 

So I wonder if it really says that somebody didn't come. I guess one "not" is missing

Regards,

Alexander