mantener
to keep, to maintainPresentewhat is going on now
Presente
Present — what is happening now, and what happens habitually
| yo | mantengoI keep | nosotros | mantenemoswe keep |
| tú | mantienesyou keep | vosotros | mantenéisyou all keep |
| él/ella/Ud. | mantienehe/she keeps | ellos/Uds. | mantienenthey keep |
Pretérito perfecto
Present perfect — have —ed; a past still touching now. Spain: today, this week. Latin America: mostly the indefinido instead
| yo | he mantenidoI have kept | nosotros | hemos mantenidowe have kept |
| tú | has mantenidoyou have kept | vosotros | habéis mantenidoyou all have kept |
| él/ella/Ud. | ha mantenidohe/she has kept | ellos/Uds. | han mantenidothey have kept |
Presente de subjuntivo
Present subjunctive — after que with wishes, doubt, emotion, ojalá
| yo | mantenga(that) I keep | nosotros | mantengamos(that) we keep |
| tú | mantengas(that) you keep | vosotros | mantengáis(that) you all keep |
| él/ella/Ud. | mantenga(that) he/she keeps | ellos/Uds. | mantengan(that) they keep |
Perfecto de subjuntivo
Present perfect subjunctive — have —ed, under doubt or emotion: no creo que haya venido
| yo | haya mantenido(that) I have kept | nosotros | hayamos mantenido(that) we have kept |
| tú | hayas mantenido(that) you have kept | vosotros | hayáis mantenido(that) you all have kept |
| él/ella/Ud. | haya mantenido(that) he/she has kept | ellos/Uds. | hayan mantenido(that) they have kept |
Pasadowhat went on
Pretérito indefinido
Preterite — a finished past action — it started, it ended
| yo | mantuveI kept | nosotros | mantuvimoswe kept |
| tú | mantuvisteyou kept | vosotros | mantuvisteisyou all kept |
| él/ella/Ud. | mantuvohe/she kept | ellos/Uds. | mantuvieronthey kept |
Pretérito imperfecto
Imperfect — used to / was —ing; background, habits, descriptions
| yo | manteníaI used to keep | nosotros | manteníamoswe used to keep |
| tú | manteníasyou used to keep | vosotros | manteníaisyou all used to keep |
| él/ella/Ud. | manteníahe/she used to keep | ellos/Uds. | manteníanthey used to keep |
Pretérito pluscuamperfecto
Past perfect — had —ed; further back than another past event
| yo | había mantenidoI had kept | nosotros | habíamos mantenidowe had kept |
| tú | habías mantenidoyou had kept | vosotros | habíais mantenidoyou all had kept |
| él/ella/Ud. | había mantenidohe/she had kept | ellos/Uds. | habían mantenidothey had kept |
Imperfecto de subjuntivo (-ra)
Imperfect subjunctive — si clauses and past-tense wishes: si tuviera, quería que fuera
| yo | mantuviera(that) I kept | nosotros | mantuviéramos(that) we kept |
| tú | mantuvieras(that) you kept | vosotros | mantuvierais(that) you all kept |
| él/ella/Ud. | mantuviera(that) he/she kept | ellos/Uds. | mantuvieran(that) they kept |
Imperfecto de subjuntivo (-se)
Imperfect subjunctive — the same tense, second form; commoner in Spain and in writing
| yo | mantuviese(that) I kept | nosotros | mantuviésemos(that) we kept |
| tú | mantuvieses(that) you kept | vosotros | mantuvieseis(that) you all kept |
| él/ella/Ud. | mantuviese(that) he/she kept | ellos/Uds. | mantuviesen(that) they kept |
Pluscuamperfecto de subjuntivo
Past perfect subjunctive — had —ed, hypothetically: si hubiera sabido
| yo | hubiera mantenido(that) I had kept | nosotros | hubiéramos mantenido(that) we had kept |
| tú | hubieras mantenido(that) you had kept | vosotros | hubierais mantenido(that) you all had kept |
| él/ella/Ud. | hubiera mantenido(that) he/she had kept | ellos/Uds. | hubieran mantenido(that) they had kept |
Pretérito anterior
Preterite perfect — had —ed, immediately before; literary, all but extinct
| yo | hube mantenidoI had kept | nosotros | hubimos mantenidowe had kept |
| tú | hubiste mantenidoyou had kept | vosotros | hubisteis mantenidoyou all had kept |
| él/ella/Ud. | hubo mantenidohe/she had kept | ellos/Uds. | hubieron mantenidothey had kept |
Futurowhat will or would go on
Futuro simple
Future — will — (spoken Spanish often prefers voy a + infinitivo)
| yo | mantendréI will keep | nosotros | mantendremoswe will keep |
| tú | mantendrásyou will keep | vosotros | mantendréisyou all will keep |
| él/ella/Ud. | mantendráhe/she will keep | ellos/Uds. | mantendránthey will keep |
Condicional simple
Conditional — would —; also softens a request into politeness
| yo | mantendríaI would keep | nosotros | mantendríamoswe would keep |
| tú | mantendríasyou would keep | vosotros | mantendríaisyou all would keep |
| él/ella/Ud. | mantendríahe/she would keep | ellos/Uds. | mantendríanthey would keep |
Futuro perfecto
Future perfect — will have —ed; done by some future point
| yo | habré mantenidoI will have kept | nosotros | habremos mantenidowe will have kept |
| tú | habrás mantenidoyou will have kept | vosotros | habréis mantenidoyou all will have kept |
| él/ella/Ud. | habrá mantenidohe/she will have kept | ellos/Uds. | habrán mantenidothey will have kept |
Condicional perfecto
Conditional perfect — would have —ed; the road not taken
| yo | habría mantenidoI would have kept | nosotros | habríamos mantenidowe would have kept |
| tú | habrías mantenidoyou would have kept | vosotros | habríais mantenidoyou all would have kept |
| él/ella/Ud. | habría mantenidohe/she would have kept | ellos/Uds. | habrían mantenidothey would have kept |
Futuro de subjuntivo
Future subjunctive — legal and proverbial only: adonde fueres, haz lo que vieres
| yo | mantuviere(should) I keep | nosotros | mantuviéremos(should) we keep |
| tú | mantuvieres(should) you keep | vosotros | mantuviereis(should) you all keep |
| él/ella/Ud. | mantuviere(should) he/she keep | ellos/Uds. | mantuvieren(should) they keep |
Imperativotelling someone to
Imperativo afirmativo
Imperative (do it) — orders and requests; there is no yo form
| yo | — | nosotros | mantengamoslet's keep |
| tú | manténkeep! | vosotros | mantenedkeep! |
| él/ella/Ud. | mantengakeep! | ellos/Uds. | mantengankeep! |
Imperativo negativo
Imperative (don't) — no + subjunctive — never the affirmative form with no in front
| yo | — | nosotros | no mantengamoslet's not keep |
| tú | no mantengasdon't keep | vosotros | no mantengáisdon't keep |
| él/ella/Ud. | no mantengadon't keep | ellos/Uds. | no mantengandon't keep |
Red = the form breaks the regular pattern. Everything in black you could have worked out from the endings alone.