Preterite-J Stems

Preterite-J stems apply in the preterite and imperfect subjunctive—the same positions as Preterite stems—but with slightly different endings.

They are strong stems, so they override overlapping Boot and Gerund when they overlap.

Here is a list of model verbs with Preterite-J stems:

Model Verbs with Preterite-J stems

Verb	Preterite-J Stem
ser	fu·era
ir	fu·era
decir	dij·era
traer	traj·era
conducir	conduj·era
bendecir	bendij·era

Preterite-J stem reference table

Pronoun	Tense	Ending
yo	Preterite	e
tú	Preterite	iste
él	Preterite	o
nosotros	Preterite	imos
vosotros	Preterite	isteis
ellos	Preterite	eron
yo	Imperfect Subjunctive	era
tú	Imperfect Subjunctive	eras
él	Imperfect Subjunctive	era
nosotros	Imperfect Subjunctive	éramos
vosotros	Imperfect Subjunctive	erais
ellos	Imperfect Subjunctive	eran