Complementació verbal:
know knew known

INTERROGATIU + TO INFINITIVE: 1) He doesn't even know how to write his own name.
No sap ni escriure el seu propi nom.; 2) I wouldn't know what to do if you ever left me.
No sabria què fer si mai em deixessis.
THAT/WHAT + SUBORDINADA: 1) I know (that) he hasn't done anything wrong.
Sé que no ha fet res dolent.; 2) He knew what it meant, but not what he was supposed to do about it.
Sabia el que volia dir, però no què havia de fer per això.
INTERROGATIU + SUBORDINADA: 1) Do you know where they want to have dinner?
Saps on volen sopar?; 2) I didn't know whose jacket it was.
No sabia de qui era la jaqueta.