I taught; I showed
I taught him everything he knows.
Yo le enseñé a andar en bicicleta.
I taught him how to ride a bicycle.
Yo le enseñé todo lo que sabe.
I taught him everything he knows.
Le enseñé a él todo lo que sabe.
I taught him everything he knows.
Yo le enseñé a él todo lo que sabe.
I taught him everything he knows.
I already showed this to my friend.