Present — what is happening now, and what happens habitually
| yo | acuerdoI agree | nosotros | acordamoswe agree |
| tú | acuerdasyou agree | vosotros | acordáisyou all agree |
| él/ella/Ud. | acuerdahe/she agrees | ellos/Uds. | acuerdanthey agree |
Present perfect — have —ed; a past still touching now. Spain: today, this week. Latin America: mostly the indefinido instead
| yo | he acordadoI have agreed | nosotros | hemos acordadowe have agreed |
| tú | has acordadoyou have agreed | vosotros | habéis acordadoyou all have agreed |
| él/ella/Ud. | ha acordadohe/she has agreed | ellos/Uds. | han acordadothey have agreed |
Present subjunctive — after que with wishes, doubt, emotion, ojalá
| yo | acuerde(that) I agree | nosotros | acordemos(that) we agree |
| tú | acuerdes(that) you agree | vosotros | acordéis(that) you all agree |
| él/ella/Ud. | acuerde(that) he/she agrees | ellos/Uds. | acuerden(that) they agree |
Present perfect subjunctive — have —ed, under doubt or emotion: no creo que haya venido
| yo | haya acordado(that) I have agreed | nosotros | hayamos acordado(that) we have agreed |
| tú | hayas acordado(that) you have agreed | vosotros | hayáis acordado(that) you all have agreed |
| él/ella/Ud. | haya acordado(that) he/she has agreed | ellos/Uds. | hayan acordado(that) they have agreed |
Preterite — a finished past action — it started, it ended
| yo | acordéI agreed | nosotros | acordamoswe agreed |
| tú | acordasteyou agreed | vosotros | acordasteisyou all agreed |
| él/ella/Ud. | acordóhe/she agreed | ellos/Uds. | acordaronthey agreed |
Imperfect — used to / was —ing; background, habits, descriptions
| yo | acordabaI used to agree | nosotros | acordábamoswe used to agree |
| tú | acordabasyou used to agree | vosotros | acordabaisyou all used to agree |
| él/ella/Ud. | acordabahe/she used to agree | ellos/Uds. | acordabanthey used to agree |
Past perfect — had —ed; further back than another past event
| yo | había acordadoI had agreed | nosotros | habíamos acordadowe had agreed |
| tú | habías acordadoyou had agreed | vosotros | habíais acordadoyou all had agreed |
| él/ella/Ud. | había acordadohe/she had agreed | ellos/Uds. | habían acordadothey had agreed |
Imperfect subjunctive — si clauses and past-tense wishes: si tuviera, quería que fuera
| yo | acordara(that) I agreed | nosotros | acordáramos(that) we agreed |
| tú | acordaras(that) you agreed | vosotros | acordarais(that) you all agreed |
| él/ella/Ud. | acordara(that) he/she agreed | ellos/Uds. | acordaran(that) they agreed |
Imperfect subjunctive — the same tense, second form; commoner in Spain and in writing
| yo | acordase(that) I agreed | nosotros | acordásemos(that) we agreed |
| tú | acordases(that) you agreed | vosotros | acordaseis(that) you all agreed |
| él/ella/Ud. | acordase(that) he/she agreed | ellos/Uds. | acordasen(that) they agreed |
Past perfect subjunctive — had —ed, hypothetically: si hubiera sabido
| yo | hubiera acordado(that) I had agreed | nosotros | hubiéramos acordado(that) we had agreed |
| tú | hubieras acordado(that) you had agreed | vosotros | hubierais acordado(that) you all had agreed |
| él/ella/Ud. | hubiera acordado(that) he/she had agreed | ellos/Uds. | hubieran acordado(that) they had agreed |
Preterite perfect — had —ed, immediately before; literary, all but extinct
| yo | hube acordadoI had agreed | nosotros | hubimos acordadowe had agreed |
| tú | hubiste acordadoyou had agreed | vosotros | hubisteis acordadoyou all had agreed |
| él/ella/Ud. | hubo acordadohe/she had agreed | ellos/Uds. | hubieron acordadothey had agreed |
Future — will — (spoken Spanish often prefers voy a + infinitivo)
| yo | acordaréI will agree | nosotros | acordaremoswe will agree |
| tú | acordarásyou will agree | vosotros | acordaréisyou all will agree |
| él/ella/Ud. | acordaráhe/she will agree | ellos/Uds. | acordaránthey will agree |
Conditional — would —; also softens a request into politeness
| yo | acordaríaI would agree | nosotros | acordaríamoswe would agree |
| tú | acordaríasyou would agree | vosotros | acordaríaisyou all would agree |
| él/ella/Ud. | acordaríahe/she would agree | ellos/Uds. | acordaríanthey would agree |
Future perfect — will have —ed; done by some future point
| yo | habré acordadoI will have agreed | nosotros | habremos acordadowe will have agreed |
| tú | habrás acordadoyou will have agreed | vosotros | habréis acordadoyou all will have agreed |
| él/ella/Ud. | habrá acordadohe/she will have agreed | ellos/Uds. | habrán acordadothey will have agreed |
Conditional perfect — would have —ed; the road not taken
| yo | habría acordadoI would have agreed | nosotros | habríamos acordadowe would have agreed |
| tú | habrías acordadoyou would have agreed | vosotros | habríais acordadoyou all would have agreed |
| él/ella/Ud. | habría acordadohe/she would have agreed | ellos/Uds. | habrían acordadothey would have agreed |
Future subjunctive — legal and proverbial only: adonde fueres, haz lo que vieres
| yo | acordare(should) I agree | nosotros | acordáremos(should) we agree |
| tú | acordares(should) you agree | vosotros | acordareis(should) you all agree |
| él/ella/Ud. | acordare(should) he/she agree | ellos/Uds. | acordaren(should) they agree |
Imperative (do it) — orders and requests; there is no yo form
| yo | — | nosotros | acordemoslet's agree |
| tú | acuerdaagree! | vosotros | acordadagree! |
| él/ella/Ud. | acuerdeagree! | ellos/Uds. | acuerdenagree! |
Imperative (don't) — no + subjunctive — never the affirmative form with no in front
| yo | — | nosotros | no acordemoslet's not agree |
| tú | no acuerdesdon't agree | vosotros | no acordéisdon't agree |
| él/ella/Ud. | no acuerdedon't agree | ellos/Uds. | no acuerdendon't agree |

Red = the form breaks the regular pattern. Everything in black you could have worked out from the endings alone.
I — the speaker
| Presente | acuerdoI agree |
| Perfecto | he acordadoI have agreed |
| Subj. presente | acuerde(that) I agree |
| Subj. perfecto | haya acordado(that) I have agreed |
| Futuro | acordaréI will agree |
| Condicional | acordaríaI would agree |
| Fut. perfecto | habré acordadoI will have agreed |
| Cond. perfecto | habría acordadoI would have agreed |
| Subj. futuro | acordare(should) I agree |
| Indefinido | acordéI agreed |
| Imperfecto | acordabaI used to agree |
| Pluscuamp. | había acordadoI had agreed |
| Subj. imperf. | acordara(that) I agreed |
| Subj. -se | acordase(that) I agreed |
| Subj. pluscuamp. | hubiera acordado(that) I had agreed |
| Pret. anterior | hube acordadoI had agreed |
| Imperativo | — |
| Imper. negativo | — |
we — the speaker plus others
| Presente | acordamoswe agree |
| Perfecto | hemos acordadowe have agreed |
| Subj. presente | acordemos(that) we agree |
| Subj. perfecto | hayamos acordado(that) we have agreed |
| Futuro | acordaremoswe will agree |
| Condicional | acordaríamoswe would agree |
| Fut. perfecto | habremos acordadowe will have agreed |
| Cond. perfecto | habríamos acordadowe would have agreed |
| Subj. futuro | acordáremos(should) we agree |
| Indefinido | acordamoswe agreed |
| Imperfecto | acordábamoswe used to agree |
| Pluscuamp. | habíamos acordadowe had agreed |
| Subj. imperf. | acordáramos(that) we agreed |
| Subj. -se | acordásemos(that) we agreed |
| Subj. pluscuamp. | hubiéramos acordado(that) we had agreed |
| Pret. anterior | hubimos acordadowe had agreed |
| Imperativo | acordemoslet's agree |
| Imper. negativo | no acordemoslet's not agree |
you (informal) — one person you are familiar with
| Presente | acuerdasyou agree |
| Perfecto | has acordadoyou have agreed |
| Subj. presente | acuerdes(that) you agree |
| Subj. perfecto | hayas acordado(that) you have agreed |
| Futuro | acordarásyou will agree |
| Condicional | acordaríasyou would agree |
| Fut. perfecto | habrás acordadoyou will have agreed |
| Cond. perfecto | habrías acordadoyou would have agreed |
| Subj. futuro | acordares(should) you agree |
| Indefinido | acordasteyou agreed |
| Imperfecto | acordabasyou used to agree |
| Pluscuamp. | habías acordadoyou had agreed |
| Subj. imperf. | acordaras(that) you agreed |
| Subj. -se | acordases(that) you agreed |
| Subj. pluscuamp. | hubieras acordado(that) you had agreed |
| Pret. anterior | hubiste acordadoyou had agreed |
| Imperativo | acuerdaagree! |
| Imper. negativo | no acuerdesdon't agree |
you all — informal plural, Spain only
| Presente | acordáisyou all agree |
| Perfecto | habéis acordadoyou all have agreed |
| Subj. presente | acordéis(that) you all agree |
| Subj. perfecto | hayáis acordado(that) you all have agreed |
| Futuro | acordaréisyou all will agree |
| Condicional | acordaríaisyou all would agree |
| Fut. perfecto | habréis acordadoyou all will have agreed |
| Cond. perfecto | habríais acordadoyou all would have agreed |
| Subj. futuro | acordareis(should) you all agree |
| Indefinido | acordasteisyou all agreed |
| Imperfecto | acordabaisyou all used to agree |
| Pluscuamp. | habíais acordadoyou all had agreed |
| Subj. imperf. | acordarais(that) you all agreed |
| Subj. -se | acordaseis(that) you all agreed |
| Subj. pluscuamp. | hubierais acordado(that) you all had agreed |
| Pret. anterior | hubisteis acordadoyou all had agreed |
| Imperativo | acordadagree! |
| Imper. negativo | no acordéisdon't agree |
he, she, you (formal) — one other person — formal you shares it
| Presente | acuerdahe/she agrees |
| Perfecto | ha acordadohe/she has agreed |
| Subj. presente | acuerde(that) he/she agrees |
| Subj. perfecto | haya acordado(that) he/she has agreed |
| Futuro | acordaráhe/she will agree |
| Condicional | acordaríahe/she would agree |
| Fut. perfecto | habrá acordadohe/she will have agreed |
| Cond. perfecto | habría acordadohe/she would have agreed |
| Subj. futuro | acordare(should) he/she agree |
| Indefinido | acordóhe/she agreed |
| Imperfecto | acordabahe/she used to agree |
| Pluscuamp. | había acordadohe/she had agreed |
| Subj. imperf. | acordara(that) he/she agreed |
| Subj. -se | acordase(that) he/she agreed |
| Subj. pluscuamp. | hubiera acordado(that) he/she had agreed |
| Pret. anterior | hubo acordadohe/she had agreed |
| Imperativo | acuerdeagree! |
| Imper. negativo | no acuerdedon't agree |
they, you all — several others — plural you shares it
| Presente | acuerdanthey agree |
| Perfecto | han acordadothey have agreed |
| Subj. presente | acuerden(that) they agree |
| Subj. perfecto | hayan acordado(that) they have agreed |
| Futuro | acordaránthey will agree |
| Condicional | acordaríanthey would agree |
| Fut. perfecto | habrán acordadothey will have agreed |
| Cond. perfecto | habrían acordadothey would have agreed |
| Subj. futuro | acordaren(should) they agree |
| Indefinido | acordaronthey agreed |
| Imperfecto | acordabanthey used to agree |
| Pluscuamp. | habían acordadothey had agreed |
| Subj. imperf. | acordaran(that) they agreed |
| Subj. -se | acordasen(that) they agreed |
| Subj. pluscuamp. | hubieran acordado(that) they had agreed |
| Pret. anterior | hubieron acordadothey had agreed |
| Imperativo | acuerdenagree! |
| Imper. negativo | no acuerdendon't agree |

Red = the form breaks the regular pattern. Everything in black you could have worked out from the endings alone.