Present — what is happening now, and what happens habitually
| yo | sustituyoI replace | nosotros | sustituimoswe replace |
| tú | sustituyesyou replace | vosotros | sustituísyou all replace |
| él/ella/Ud. | sustituyehe/she replaces | ellos/Uds. | sustituyenthey replace |
Present perfect — have —ed; a past still touching now. Spain: today, this week. Latin America: mostly the indefinido instead
| yo | he sustituidoI have replaced | nosotros | hemos sustituidowe have replaced |
| tú | has sustituidoyou have replaced | vosotros | habéis sustituidoyou all have replaced |
| él/ella/Ud. | ha sustituidohe/she has replaced | ellos/Uds. | han sustituidothey have replaced |
Present subjunctive — after que with wishes, doubt, emotion, ojalá
| yo | sustituya(that) I replace | nosotros | sustituyamos(that) we replace |
| tú | sustituyas(that) you replace | vosotros | sustituyáis(that) you all replace |
| él/ella/Ud. | sustituya(that) he/she replaces | ellos/Uds. | sustituyan(that) they replace |
Present perfect subjunctive — have —ed, under doubt or emotion: no creo que haya venido
| yo | haya sustituido(that) I have replaced | nosotros | hayamos sustituido(that) we have replaced |
| tú | hayas sustituido(that) you have replaced | vosotros | hayáis sustituido(that) you all have replaced |
| él/ella/Ud. | haya sustituido(that) he/she has replaced | ellos/Uds. | hayan sustituido(that) they have replaced |
Preterite — a finished past action — it started, it ended
| yo | sustituíI replaced | nosotros | sustituimoswe replaced |
| tú | sustituisteyou replaced | vosotros | sustituisteisyou all replaced |
| él/ella/Ud. | sustituyóhe/she replaced | ellos/Uds. | sustituyeronthey replaced |
Imperfect — used to / was —ing; background, habits, descriptions
| yo | sustituíaI used to replace | nosotros | sustituíamoswe used to replace |
| tú | sustituíasyou used to replace | vosotros | sustituíaisyou all used to replace |
| él/ella/Ud. | sustituíahe/she used to replace | ellos/Uds. | sustituíanthey used to replace |
Past perfect — had —ed; further back than another past event
| yo | había sustituidoI had replaced | nosotros | habíamos sustituidowe had replaced |
| tú | habías sustituidoyou had replaced | vosotros | habíais sustituidoyou all had replaced |
| él/ella/Ud. | había sustituidohe/she had replaced | ellos/Uds. | habían sustituidothey had replaced |
Imperfect subjunctive — si clauses and past-tense wishes: si tuviera, quería que fuera
| yo | sustituyera(that) I replaced | nosotros | sustituyéramos(that) we replaced |
| tú | sustituyeras(that) you replaced | vosotros | sustituyerais(that) you all replaced |
| él/ella/Ud. | sustituyera(that) he/she replaced | ellos/Uds. | sustituyeran(that) they replaced |
Imperfect subjunctive — the same tense, second form; commoner in Spain and in writing
| yo | sustituyese(that) I replaced | nosotros | sustituyésemos(that) we replaced |
| tú | sustituyeses(that) you replaced | vosotros | sustituyeseis(that) you all replaced |
| él/ella/Ud. | sustituyese(that) he/she replaced | ellos/Uds. | sustituyesen(that) they replaced |
Past perfect subjunctive — had —ed, hypothetically: si hubiera sabido
| yo | hubiera sustituido(that) I had replaced | nosotros | hubiéramos sustituido(that) we had replaced |
| tú | hubieras sustituido(that) you had replaced | vosotros | hubierais sustituido(that) you all had replaced |
| él/ella/Ud. | hubiera sustituido(that) he/she had replaced | ellos/Uds. | hubieran sustituido(that) they had replaced |
Preterite perfect — had —ed, immediately before; literary, all but extinct
| yo | hube sustituidoI had replaced | nosotros | hubimos sustituidowe had replaced |
| tú | hubiste sustituidoyou had replaced | vosotros | hubisteis sustituidoyou all had replaced |
| él/ella/Ud. | hubo sustituidohe/she had replaced | ellos/Uds. | hubieron sustituidothey had replaced |
Future — will — (spoken Spanish often prefers voy a + infinitivo)
| yo | sustituiréI will replace | nosotros | sustituiremoswe will replace |
| tú | sustituirásyou will replace | vosotros | sustituiréisyou all will replace |
| él/ella/Ud. | sustituiráhe/she will replace | ellos/Uds. | sustituiránthey will replace |
Conditional — would —; also softens a request into politeness
| yo | sustituiríaI would replace | nosotros | sustituiríamoswe would replace |
| tú | sustituiríasyou would replace | vosotros | sustituiríaisyou all would replace |
| él/ella/Ud. | sustituiríahe/she would replace | ellos/Uds. | sustituiríanthey would replace |
Future perfect — will have —ed; done by some future point
| yo | habré sustituidoI will have replaced | nosotros | habremos sustituidowe will have replaced |
| tú | habrás sustituidoyou will have replaced | vosotros | habréis sustituidoyou all will have replaced |
| él/ella/Ud. | habrá sustituidohe/she will have replaced | ellos/Uds. | habrán sustituidothey will have replaced |
Conditional perfect — would have —ed; the road not taken
| yo | habría sustituidoI would have replaced | nosotros | habríamos sustituidowe would have replaced |
| tú | habrías sustituidoyou would have replaced | vosotros | habríais sustituidoyou all would have replaced |
| él/ella/Ud. | habría sustituidohe/she would have replaced | ellos/Uds. | habrían sustituidothey would have replaced |
Future subjunctive — legal and proverbial only: adonde fueres, haz lo que vieres
| yo | sustituyere(should) I replace | nosotros | sustituyéremos(should) we replace |
| tú | sustituyeres(should) you replace | vosotros | sustituyereis(should) you all replace |
| él/ella/Ud. | sustituyere(should) he/she replace | ellos/Uds. | sustituyeren(should) they replace |
Imperative (do it) — orders and requests; there is no yo form
| yo | — | nosotros | sustituyamoslet's replace |
| tú | sustituyereplace! | vosotros | sustituidreplace! |
| él/ella/Ud. | sustituyareplace! | ellos/Uds. | sustituyanreplace! |
Imperative (don't) — no + subjunctive — never the affirmative form with no in front
| yo | — | nosotros | no sustituyamoslet's not replace |
| tú | no sustituyasdon't replace | vosotros | no sustituyáisdon't replace |
| él/ella/Ud. | no sustituyadon't replace | ellos/Uds. | no sustituyandon't replace |

I — the speaker
| Presente | sustituyoI replace |
| Perfecto | he sustituidoI have replaced |
| Subj. presente | sustituya(that) I replace |
| Subj. perfecto | haya sustituido(that) I have replaced |
| Futuro | sustituiréI will replace |
| Condicional | sustituiríaI would replace |
| Fut. perfecto | habré sustituidoI will have replaced |
| Cond. perfecto | habría sustituidoI would have replaced |
| Subj. futuro | sustituyere(should) I replace |
| Indefinido | sustituíI replaced |
| Imperfecto | sustituíaI used to replace |
| Pluscuamp. | había sustituidoI had replaced |
| Subj. imperf. | sustituyera(that) I replaced |
| Subj. -se | sustituyese(that) I replaced |
| Subj. pluscuamp. | hubiera sustituido(that) I had replaced |
| Pret. anterior | hube sustituidoI had replaced |
| Imperativo | — |
| Imper. negativo | — |
we — the speaker plus others
| Presente | sustituimoswe replace |
| Perfecto | hemos sustituidowe have replaced |
| Subj. presente | sustituyamos(that) we replace |
| Subj. perfecto | hayamos sustituido(that) we have replaced |
| Futuro | sustituiremoswe will replace |
| Condicional | sustituiríamoswe would replace |
| Fut. perfecto | habremos sustituidowe will have replaced |
| Cond. perfecto | habríamos sustituidowe would have replaced |
| Subj. futuro | sustituyéremos(should) we replace |
| Indefinido | sustituimoswe replaced |
| Imperfecto | sustituíamoswe used to replace |
| Pluscuamp. | habíamos sustituidowe had replaced |
| Subj. imperf. | sustituyéramos(that) we replaced |
| Subj. -se | sustituyésemos(that) we replaced |
| Subj. pluscuamp. | hubiéramos sustituido(that) we had replaced |
| Pret. anterior | hubimos sustituidowe had replaced |
| Imperativo | sustituyamoslet's replace |
| Imper. negativo | no sustituyamoslet's not replace |
you (informal) — one person you are familiar with
| Presente | sustituyesyou replace |
| Perfecto | has sustituidoyou have replaced |
| Subj. presente | sustituyas(that) you replace |
| Subj. perfecto | hayas sustituido(that) you have replaced |
| Futuro | sustituirásyou will replace |
| Condicional | sustituiríasyou would replace |
| Fut. perfecto | habrás sustituidoyou will have replaced |
| Cond. perfecto | habrías sustituidoyou would have replaced |
| Subj. futuro | sustituyeres(should) you replace |
| Indefinido | sustituisteyou replaced |
| Imperfecto | sustituíasyou used to replace |
| Pluscuamp. | habías sustituidoyou had replaced |
| Subj. imperf. | sustituyeras(that) you replaced |
| Subj. -se | sustituyeses(that) you replaced |
| Subj. pluscuamp. | hubieras sustituido(that) you had replaced |
| Pret. anterior | hubiste sustituidoyou had replaced |
| Imperativo | sustituyereplace! |
| Imper. negativo | no sustituyasdon't replace |
you all — informal plural, Spain only
| Presente | sustituísyou all replace |
| Perfecto | habéis sustituidoyou all have replaced |
| Subj. presente | sustituyáis(that) you all replace |
| Subj. perfecto | hayáis sustituido(that) you all have replaced |
| Futuro | sustituiréisyou all will replace |
| Condicional | sustituiríaisyou all would replace |
| Fut. perfecto | habréis sustituidoyou all will have replaced |
| Cond. perfecto | habríais sustituidoyou all would have replaced |
| Subj. futuro | sustituyereis(should) you all replace |
| Indefinido | sustituisteisyou all replaced |
| Imperfecto | sustituíaisyou all used to replace |
| Pluscuamp. | habíais sustituidoyou all had replaced |
| Subj. imperf. | sustituyerais(that) you all replaced |
| Subj. -se | sustituyeseis(that) you all replaced |
| Subj. pluscuamp. | hubierais sustituido(that) you all had replaced |
| Pret. anterior | hubisteis sustituidoyou all had replaced |
| Imperativo | sustituidreplace! |
| Imper. negativo | no sustituyáisdon't replace |
he, she, you (formal) — one other person — formal you shares it
| Presente | sustituyehe/she replaces |
| Perfecto | ha sustituidohe/she has replaced |
| Subj. presente | sustituya(that) he/she replaces |
| Subj. perfecto | haya sustituido(that) he/she has replaced |
| Futuro | sustituiráhe/she will replace |
| Condicional | sustituiríahe/she would replace |
| Fut. perfecto | habrá sustituidohe/she will have replaced |
| Cond. perfecto | habría sustituidohe/she would have replaced |
| Subj. futuro | sustituyere(should) he/she replace |
| Indefinido | sustituyóhe/she replaced |
| Imperfecto | sustituíahe/she used to replace |
| Pluscuamp. | había sustituidohe/she had replaced |
| Subj. imperf. | sustituyera(that) he/she replaced |
| Subj. -se | sustituyese(that) he/she replaced |
| Subj. pluscuamp. | hubiera sustituido(that) he/she had replaced |
| Pret. anterior | hubo sustituidohe/she had replaced |
| Imperativo | sustituyareplace! |
| Imper. negativo | no sustituyadon't replace |
they, you all — several others — plural you shares it
| Presente | sustituyenthey replace |
| Perfecto | han sustituidothey have replaced |
| Subj. presente | sustituyan(that) they replace |
| Subj. perfecto | hayan sustituido(that) they have replaced |
| Futuro | sustituiránthey will replace |
| Condicional | sustituiríanthey would replace |
| Fut. perfecto | habrán sustituidothey will have replaced |
| Cond. perfecto | habrían sustituidothey would have replaced |
| Subj. futuro | sustituyeren(should) they replace |
| Indefinido | sustituyeronthey replaced |
| Imperfecto | sustituíanthey used to replace |
| Pluscuamp. | habían sustituidothey had replaced |
| Subj. imperf. | sustituyeran(that) they replaced |
| Subj. -se | sustituyesen(that) they replaced |
| Subj. pluscuamp. | hubieran sustituido(that) they had replaced |
| Pret. anterior | hubieron sustituidothey had replaced |
| Imperativo | sustituyanreplace! |
| Imper. negativo | no sustituyandon't replace |
