: The o in the stem changes to ue .
Use this key to check your answers and evaluate your understanding. (E to IE change) pensamos (No change in nosotros ) pueden (O to UE change) duermes (O to UE change) sirve (E to I change) preferís (No change in vosotros ) vuelven (O to UE change) pide (E to I change) hago (Irregular yo form) conozco (Vowel + cer changes to zco ) pongo (Irregular yo form) tenemos (No stem change in nosotros ) dices (E to I change) salgo (Irregular yo form) vienen (E to IE change) soy (Totally irregular) está (Requires accent mark) vamos (Totally irregular) sé (Requires accent mark) da (Totally irregular) : The o in the stem changes to ue
(To know facts/information): sé, sabes, sabe, sabemos, sabéis, saben Dar (To give): doy, das, da, damos, dais, dan Exercises: Presente de Indicativo saben Dar (To give): doy