to know  - saber, conocer (a una persona, un lugar), reconocer, distinguir, discernir 

to suppose  - suponer, imaginarse, creer 

to be informed  - informar, notificar, avisar 

to know how to

to be able to

to learn  - aprender, aprender de memoria, enterarse, saber, enterarse de 

to find out  - descubrir, averiguar, enterarse 

to taste  - probar (alimentos), degustar, catar (vinos), saber