Stem-changing subjunctive (-ar, -er)

Stem changes in the subjunctive

In the present subjunctive, -ar and -er stem-changing verbs behave just as they do in the present indicative. Stem changes (e -> ie or o -> ue) apply to all forms except nosotros and vosotros.

Verbs with e -> ie changes

Take cerrar (to close). The e changes to ie, except for the nosotros and vosotros forms:

SubjectCerrar (e -> ie)
yocierre
túcierres
él/ella/ustedcierre
nosotros/ascerremos
vosotros/ascerréis
ellos/ellas/ustedescierren
I need you to close the blind, please.
Necesito que cierres la persiana, por favor.
I prefer that we close the curtains.
Prefiero que cerremos las cortinas.

Verbs ending in -gar need an additional spelling change to preserve the hard "g" sound (g -> gu). For example, fregar (to wash) becomes friegue in the subjunctive.

I want the boy to wash the dishes today.
Quiero que el niño friegue la vajilla hoy.
I usually wash the dishes, but I prefer that you wash them.
Suelo fregar la vajilla, pero prefiero que tú la friegues.

Verbs with o -> ue changes

Verbs like mover (to move) and resolver (to solve) follow the same pattern, changing their o to ue in all forms except nosotros and vosotros.

I hope the manager solves my complaint today.
Ojalá el gerente resuelva mi queja hoy.
The boss needs us to solve the clients' complaints.
La jefa necesita que resolvamos las quejas de los clientes.
It is important that you (pl.) solve the complaint quickly.
Es importante que resolváis la queja rápido.

Just like fregar, stem-changing verbs ending in -gar need the gu spelling change. For example, colgar (to hang) becomes cuelgue.

Madam, I beg you to hang your coat on the coat rack.
Señora, le ruego que cuelgue su abrigo en el perchero.
Give it to him! I need him to hang the jacket on the coat rack.
¡Dásela! Necesito que él cuelgue la chaqueta en el perchero.