Present — what is happening now, and what happens habitually
| yo | prueboI try | nosotros | probamoswe try |
| tú | pruebasyou try | vosotros | probáisyou all try |
| él/ella/Ud. | pruebahe/she tries | ellos/Uds. | pruebanthey try |
Present perfect — have —ed; a past still touching now. Spain: today, this week. Latin America: mostly the indefinido instead
| yo | he probadoI have tried | nosotros | hemos probadowe have tried |
| tú | has probadoyou have tried | vosotros | habéis probadoyou all have tried |
| él/ella/Ud. | ha probadohe/she has tried | ellos/Uds. | han probadothey have tried |
Present subjunctive — after que with wishes, doubt, emotion, ojalá
| yo | pruebe(that) I try | nosotros | probemos(that) we try |
| tú | pruebes(that) you try | vosotros | probéis(that) you all try |
| él/ella/Ud. | pruebe(that) he/she tries | ellos/Uds. | prueben(that) they try |
Present perfect subjunctive — have —ed, under doubt or emotion: no creo que haya venido
| yo | haya probado(that) I have tried | nosotros | hayamos probado(that) we have tried |
| tú | hayas probado(that) you have tried | vosotros | hayáis probado(that) you all have tried |
| él/ella/Ud. | haya probado(that) he/she has tried | ellos/Uds. | hayan probado(that) they have tried |
Preterite — a finished past action — it started, it ended
| yo | probéI tried | nosotros | probamoswe tried |
| tú | probasteyou tried | vosotros | probasteisyou all tried |
| él/ella/Ud. | probóhe/she tried | ellos/Uds. | probaronthey tried |
Imperfect — used to / was —ing; background, habits, descriptions
| yo | probabaI used to try | nosotros | probábamoswe used to try |
| tú | probabasyou used to try | vosotros | probabaisyou all used to try |
| él/ella/Ud. | probabahe/she used to try | ellos/Uds. | probabanthey used to try |
Past perfect — had —ed; further back than another past event
| yo | había probadoI had tried | nosotros | habíamos probadowe had tried |
| tú | habías probadoyou had tried | vosotros | habíais probadoyou all had tried |
| él/ella/Ud. | había probadohe/she had tried | ellos/Uds. | habían probadothey had tried |
Imperfect subjunctive — si clauses and past-tense wishes: si tuviera, quería que fuera
| yo | probara(that) I tried | nosotros | probáramos(that) we tried |
| tú | probaras(that) you tried | vosotros | probarais(that) you all tried |
| él/ella/Ud. | probara(that) he/she tried | ellos/Uds. | probaran(that) they tried |
Imperfect subjunctive — the same tense, second form; commoner in Spain and in writing
| yo | probase(that) I tried | nosotros | probásemos(that) we tried |
| tú | probases(that) you tried | vosotros | probaseis(that) you all tried |
| él/ella/Ud. | probase(that) he/she tried | ellos/Uds. | probasen(that) they tried |
Past perfect subjunctive — had —ed, hypothetically: si hubiera sabido
| yo | hubiera probado(that) I had tried | nosotros | hubiéramos probado(that) we had tried |
| tú | hubieras probado(that) you had tried | vosotros | hubierais probado(that) you all had tried |
| él/ella/Ud. | hubiera probado(that) he/she had tried | ellos/Uds. | hubieran probado(that) they had tried |
Preterite perfect — had —ed, immediately before; literary, all but extinct
| yo | hube probadoI had tried | nosotros | hubimos probadowe had tried |
| tú | hubiste probadoyou had tried | vosotros | hubisteis probadoyou all had tried |
| él/ella/Ud. | hubo probadohe/she had tried | ellos/Uds. | hubieron probadothey had tried |
Future — will — (spoken Spanish often prefers voy a + infinitivo)
| yo | probaréI will try | nosotros | probaremoswe will try |
| tú | probarásyou will try | vosotros | probaréisyou all will try |
| él/ella/Ud. | probaráhe/she will try | ellos/Uds. | probaránthey will try |
Conditional — would —; also softens a request into politeness
| yo | probaríaI would try | nosotros | probaríamoswe would try |
| tú | probaríasyou would try | vosotros | probaríaisyou all would try |
| él/ella/Ud. | probaríahe/she would try | ellos/Uds. | probaríanthey would try |
Future perfect — will have —ed; done by some future point
| yo | habré probadoI will have tried | nosotros | habremos probadowe will have tried |
| tú | habrás probadoyou will have tried | vosotros | habréis probadoyou all will have tried |
| él/ella/Ud. | habrá probadohe/she will have tried | ellos/Uds. | habrán probadothey will have tried |
Conditional perfect — would have —ed; the road not taken
| yo | habría probadoI would have tried | nosotros | habríamos probadowe would have tried |
| tú | habrías probadoyou would have tried | vosotros | habríais probadoyou all would have tried |
| él/ella/Ud. | habría probadohe/she would have tried | ellos/Uds. | habrían probadothey would have tried |
Future subjunctive — legal and proverbial only: adonde fueres, haz lo que vieres
| yo | probare(should) I try | nosotros | probáremos(should) we try |
| tú | probares(should) you try | vosotros | probareis(should) you all try |
| él/ella/Ud. | probare(should) he/she try | ellos/Uds. | probaren(should) they try |
Imperative (do it) — orders and requests; there is no yo form
| yo | — | nosotros | probemoslet's try |
| tú | pruebatry! | vosotros | probadtry! |
| él/ella/Ud. | pruebetry! | ellos/Uds. | pruebentry! |
Imperative (don't) — no + subjunctive — never the affirmative form with no in front
| yo | — | nosotros | no probemoslet's not try |
| tú | no pruebesdon't try | vosotros | no probéisdon't try |
| él/ella/Ud. | no pruebedon't try | ellos/Uds. | no pruebendon't try |

Red = the form breaks the regular pattern. Everything in black you could have worked out from the endings alone.
I — the speaker
| Presente | prueboI try |
| Perfecto | he probadoI have tried |
| Subj. presente | pruebe(that) I try |
| Subj. perfecto | haya probado(that) I have tried |
| Futuro | probaréI will try |
| Condicional | probaríaI would try |
| Fut. perfecto | habré probadoI will have tried |
| Cond. perfecto | habría probadoI would have tried |
| Subj. futuro | probare(should) I try |
| Indefinido | probéI tried |
| Imperfecto | probabaI used to try |
| Pluscuamp. | había probadoI had tried |
| Subj. imperf. | probara(that) I tried |
| Subj. -se | probase(that) I tried |
| Subj. pluscuamp. | hubiera probado(that) I had tried |
| Pret. anterior | hube probadoI had tried |
| Imperativo | — |
| Imper. negativo | — |
we — the speaker plus others
| Presente | probamoswe try |
| Perfecto | hemos probadowe have tried |
| Subj. presente | probemos(that) we try |
| Subj. perfecto | hayamos probado(that) we have tried |
| Futuro | probaremoswe will try |
| Condicional | probaríamoswe would try |
| Fut. perfecto | habremos probadowe will have tried |
| Cond. perfecto | habríamos probadowe would have tried |
| Subj. futuro | probáremos(should) we try |
| Indefinido | probamoswe tried |
| Imperfecto | probábamoswe used to try |
| Pluscuamp. | habíamos probadowe had tried |
| Subj. imperf. | probáramos(that) we tried |
| Subj. -se | probásemos(that) we tried |
| Subj. pluscuamp. | hubiéramos probado(that) we had tried |
| Pret. anterior | hubimos probadowe had tried |
| Imperativo | probemoslet's try |
| Imper. negativo | no probemoslet's not try |
you (informal) — one person you are familiar with
| Presente | pruebasyou try |
| Perfecto | has probadoyou have tried |
| Subj. presente | pruebes(that) you try |
| Subj. perfecto | hayas probado(that) you have tried |
| Futuro | probarásyou will try |
| Condicional | probaríasyou would try |
| Fut. perfecto | habrás probadoyou will have tried |
| Cond. perfecto | habrías probadoyou would have tried |
| Subj. futuro | probares(should) you try |
| Indefinido | probasteyou tried |
| Imperfecto | probabasyou used to try |
| Pluscuamp. | habías probadoyou had tried |
| Subj. imperf. | probaras(that) you tried |
| Subj. -se | probases(that) you tried |
| Subj. pluscuamp. | hubieras probado(that) you had tried |
| Pret. anterior | hubiste probadoyou had tried |
| Imperativo | pruebatry! |
| Imper. negativo | no pruebesdon't try |
you all — informal plural, Spain only
| Presente | probáisyou all try |
| Perfecto | habéis probadoyou all have tried |
| Subj. presente | probéis(that) you all try |
| Subj. perfecto | hayáis probado(that) you all have tried |
| Futuro | probaréisyou all will try |
| Condicional | probaríaisyou all would try |
| Fut. perfecto | habréis probadoyou all will have tried |
| Cond. perfecto | habríais probadoyou all would have tried |
| Subj. futuro | probareis(should) you all try |
| Indefinido | probasteisyou all tried |
| Imperfecto | probabaisyou all used to try |
| Pluscuamp. | habíais probadoyou all had tried |
| Subj. imperf. | probarais(that) you all tried |
| Subj. -se | probaseis(that) you all tried |
| Subj. pluscuamp. | hubierais probado(that) you all had tried |
| Pret. anterior | hubisteis probadoyou all had tried |
| Imperativo | probadtry! |
| Imper. negativo | no probéisdon't try |
he, she, you (formal) — one other person — formal you shares it
| Presente | pruebahe/she tries |
| Perfecto | ha probadohe/she has tried |
| Subj. presente | pruebe(that) he/she tries |
| Subj. perfecto | haya probado(that) he/she has tried |
| Futuro | probaráhe/she will try |
| Condicional | probaríahe/she would try |
| Fut. perfecto | habrá probadohe/she will have tried |
| Cond. perfecto | habría probadohe/she would have tried |
| Subj. futuro | probare(should) he/she try |
| Indefinido | probóhe/she tried |
| Imperfecto | probabahe/she used to try |
| Pluscuamp. | había probadohe/she had tried |
| Subj. imperf. | probara(that) he/she tried |
| Subj. -se | probase(that) he/she tried |
| Subj. pluscuamp. | hubiera probado(that) he/she had tried |
| Pret. anterior | hubo probadohe/she had tried |
| Imperativo | pruebetry! |
| Imper. negativo | no pruebedon't try |
they, you all — several others — plural you shares it
| Presente | pruebanthey try |
| Perfecto | han probadothey have tried |
| Subj. presente | prueben(that) they try |
| Subj. perfecto | hayan probado(that) they have tried |
| Futuro | probaránthey will try |
| Condicional | probaríanthey would try |
| Fut. perfecto | habrán probadothey will have tried |
| Cond. perfecto | habrían probadothey would have tried |
| Subj. futuro | probaren(should) they try |
| Indefinido | probaronthey tried |
| Imperfecto | probabanthey used to try |
| Pluscuamp. | habían probadothey had tried |
| Subj. imperf. | probaran(that) they tried |
| Subj. -se | probasen(that) they tried |
| Subj. pluscuamp. | hubieran probado(that) they had tried |
| Pret. anterior | hubieron probadothey had tried |
| Imperativo | pruebentry! |
| Imper. negativo | no pruebendon't try |

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