abrir

to openpor tiempo-ir irregular
participio abiertogerundio abriendohe + participio he abiertoestoy + gerundio estoy abriendo

Presentewhat is going on now

Presente

Present — what is happening now, and what happens habitually

yoabroI opennosotrosabrimoswe open
túabresyou openvosotrosabrísyou all open
él/ella/Ud.abrehe/she opensellos/Uds.abrenthey open

Pretérito perfecto

Present perfect — have —ed; a past still touching now. Spain: today, this week. Latin America: mostly the indefinido instead

yohe abiertoI have openednosotroshemos abiertowe have opened
túhas abiertoyou have openedvosotroshabéis abiertoyou all have opened
él/ella/Ud.ha abiertohe/she has openedellos/Uds.han abiertothey have opened

Presente de subjuntivo

Present subjunctive — after que with wishes, doubt, emotion, ojalá

yoabra(that) I opennosotrosabramos(that) we open
túabras(that) you openvosotrosabráis(that) you all open
él/ella/Ud.abra(that) he/she opensellos/Uds.abran(that) they open

Perfecto de subjuntivo

Present perfect subjunctive — have —ed, under doubt or emotion: no creo que haya venido

yohaya abierto(that) I have openednosotroshayamos abierto(that) we have opened
túhayas abierto(that) you have openedvosotroshayáis abierto(that) you all have opened
él/ella/Ud.haya abierto(that) he/she has openedellos/Uds.hayan abierto(that) they have opened

Pasadowhat went on

Pretérito indefinido

Preterite — a finished past action — it started, it ended

yoabríI openednosotrosabrimoswe opened
túabristeyou openedvosotrosabristeisyou all opened
él/ella/Ud.abrióhe/she openedellos/Uds.abrieronthey opened

Pretérito imperfecto

Imperfect — used to / was —ing; background, habits, descriptions

yoabríaI used to opennosotrosabríamoswe used to open
túabríasyou used to openvosotrosabríaisyou all used to open
él/ella/Ud.abríahe/she used to openellos/Uds.abríanthey used to open

Pretérito pluscuamperfecto

Past perfect — had —ed; further back than another past event

yohabía abiertoI had openednosotroshabíamos abiertowe had opened
túhabías abiertoyou had openedvosotroshabíais abiertoyou all had opened
él/ella/Ud.había abiertohe/she had openedellos/Uds.habían abiertothey had opened

Imperfecto de subjuntivo (-ra)

Imperfect subjunctive — si clauses and past-tense wishes: si tuviera, quería que fuera

yoabriera(that) I openednosotrosabriéramos(that) we opened
túabrieras(that) you openedvosotrosabrierais(that) you all opened
él/ella/Ud.abriera(that) he/she openedellos/Uds.abrieran(that) they opened

Imperfecto de subjuntivo (-se)

Imperfect subjunctive — the same tense, second form; commoner in Spain and in writing

yoabriese(that) I openednosotrosabriésemos(that) we opened
túabrieses(that) you openedvosotrosabrieseis(that) you all opened
él/ella/Ud.abriese(that) he/she openedellos/Uds.abriesen(that) they opened

Pluscuamperfecto de subjuntivo

Past perfect subjunctive — had —ed, hypothetically: si hubiera sabido

yohubiera abierto(that) I had openednosotroshubiéramos abierto(that) we had opened
túhubieras abierto(that) you had openedvosotroshubierais abierto(that) you all had opened
él/ella/Ud.hubiera abierto(that) he/she had openedellos/Uds.hubieran abierto(that) they had opened

Pretérito anterior

Preterite perfect — had —ed, immediately before; literary, all but extinct

yohube abiertoI had openednosotroshubimos abiertowe had opened
túhubiste abiertoyou had openedvosotroshubisteis abiertoyou all had opened
él/ella/Ud.hubo abiertohe/she had openedellos/Uds.hubieron abiertothey had opened

Futurowhat will or would go on

Futuro simple

Future — will — (spoken Spanish often prefers voy a + infinitivo)

yoabriréI will opennosotrosabriremoswe will open
túabrirásyou will openvosotrosabriréisyou all will open
él/ella/Ud.abriráhe/she will openellos/Uds.abriránthey will open

Condicional simple

Conditional — would —; also softens a request into politeness

yoabriríaI would opennosotrosabriríamoswe would open
túabriríasyou would openvosotrosabriríaisyou all would open
él/ella/Ud.abriríahe/she would openellos/Uds.abriríanthey would open

Futuro perfecto

Future perfect — will have —ed; done by some future point

yohabré abiertoI will have openednosotroshabremos abiertowe will have opened
túhabrás abiertoyou will have openedvosotroshabréis abiertoyou all will have opened
él/ella/Ud.habrá abiertohe/she will have openedellos/Uds.habrán abiertothey will have opened

Condicional perfecto

Conditional perfect — would have —ed; the road not taken

yohabría abiertoI would have openednosotroshabríamos abiertowe would have opened
túhabrías abiertoyou would have openedvosotroshabríais abiertoyou all would have opened
él/ella/Ud.habría abiertohe/she would have openedellos/Uds.habrían abiertothey would have opened

Futuro de subjuntivo

Future subjunctive — legal and proverbial only: adonde fueres, haz lo que vieres

yoabriere(should) I opennosotrosabriéremos(should) we open
túabrieres(should) you openvosotrosabriereis(should) you all open
él/ella/Ud.abriere(should) he/she openellos/Uds.abrieren(should) they open

Imperativotelling someone to

Imperativo afirmativo

Imperative (do it) — orders and requests; there is no yo form

yo—nosotrosabramoslet's open
túabreopen!vosotrosabridopen!
él/ella/Ud.abraopen!ellos/Uds.abranopen!

Imperativo negativo

Imperative (don't) — no + subjunctive — never the affirmative form with no in front

yo—nosotrosno abramoslet's not open
túno abrasdon't openvosotrosno abráisdon't open
él/ella/Ud.no abradon't openellos/Uds.no abrandon't open
Imagen. La puerta de madera — traducido de The Wooden Door (omerify · flickr · CC0)

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

abrir

to openpor persona-ir irregular
participio abiertogerundio abriendohe + participio he abiertoestoy + gerundio estoy abriendo

yo

I — the speaker

PresenteabroI open
Perfectohe abiertoI have opened
Subj. presenteabra(that) I open
Subj. perfectohaya abierto(that) I have opened
FuturoabriréI will open
CondicionalabriríaI would open
Fut. perfectohabré abiertoI will have opened
Cond. perfectohabría abiertoI would have opened
Subj. futuroabriere(should) I open
IndefinidoabríI opened
ImperfectoabríaI used to open
Pluscuamp.había abiertoI had opened
Subj. imperf.abriera(that) I opened
Subj. -seabriese(that) I opened
Subj. pluscuamp.hubiera abierto(that) I had opened
Pret. anteriorhube abiertoI had opened
Imperativo—
Imper. negativo—

nosotros / nosotras

we — the speaker plus others

Presenteabrimoswe open
Perfectohemos abiertowe have opened
Subj. presenteabramos(that) we open
Subj. perfectohayamos abierto(that) we have opened
Futuroabriremoswe will open
Condicionalabriríamoswe would open
Fut. perfectohabremos abiertowe will have opened
Cond. perfectohabríamos abiertowe would have opened
Subj. futuroabriéremos(should) we open
Indefinidoabrimoswe opened
Imperfectoabríamoswe used to open
Pluscuamp.habíamos abiertowe had opened
Subj. imperf.abriéramos(that) we opened
Subj. -seabriésemos(that) we opened
Subj. pluscuamp.hubiéramos abierto(that) we had opened
Pret. anteriorhubimos abiertowe had opened
Imperativoabramoslet's open
Imper. negativono abramoslet's not open

tú

you (informal) — one person you are familiar with

Presenteabresyou open
Perfectohas abiertoyou have opened
Subj. presenteabras(that) you open
Subj. perfectohayas abierto(that) you have opened
Futuroabrirásyou will open
Condicionalabriríasyou would open
Fut. perfectohabrás abiertoyou will have opened
Cond. perfectohabrías abiertoyou would have opened
Subj. futuroabrieres(should) you open
Indefinidoabristeyou opened
Imperfectoabríasyou used to open
Pluscuamp.habías abiertoyou had opened
Subj. imperf.abrieras(that) you opened
Subj. -seabrieses(that) you opened
Subj. pluscuamp.hubieras abierto(that) you had opened
Pret. anteriorhubiste abiertoyou had opened
Imperativoabreopen!
Imper. negativono abrasdon't open

vosotros / vosotras

you all — informal plural, Spain only

Presenteabrísyou all open
Perfectohabéis abiertoyou all have opened
Subj. presenteabráis(that) you all open
Subj. perfectohayáis abierto(that) you all have opened
Futuroabriréisyou all will open
Condicionalabriríaisyou all would open
Fut. perfectohabréis abiertoyou all will have opened
Cond. perfectohabríais abiertoyou all would have opened
Subj. futuroabriereis(should) you all open
Indefinidoabristeisyou all opened
Imperfectoabríaisyou all used to open
Pluscuamp.habíais abiertoyou all had opened
Subj. imperf.abrierais(that) you all opened
Subj. -seabrieseis(that) you all opened
Subj. pluscuamp.hubierais abierto(that) you all had opened
Pret. anteriorhubisteis abiertoyou all had opened
Imperativoabridopen!
Imper. negativono abráisdon't open

él / ella / usted

he, she, you (formal) — one other person — formal you shares it

Presenteabrehe/she opens
Perfectoha abiertohe/she has opened
Subj. presenteabra(that) he/she opens
Subj. perfectohaya abierto(that) he/she has opened
Futuroabriráhe/she will open
Condicionalabriríahe/she would open
Fut. perfectohabrá abiertohe/she will have opened
Cond. perfectohabría abiertohe/she would have opened
Subj. futuroabriere(should) he/she open
Indefinidoabrióhe/she opened
Imperfectoabríahe/she used to open
Pluscuamp.había abiertohe/she had opened
Subj. imperf.abriera(that) he/she opened
Subj. -seabriese(that) he/she opened
Subj. pluscuamp.hubiera abierto(that) he/she had opened
Pret. anteriorhubo abiertohe/she had opened
Imperativoabraopen!
Imper. negativono abradon't open

ellos / ellas / ustedes

they, you all — several others — plural you shares it

Presenteabrenthey open
Perfectohan abiertothey have opened
Subj. presenteabran(that) they open
Subj. perfectohayan abierto(that) they have opened
Futuroabriránthey will open
Condicionalabriríanthey would open
Fut. perfectohabrán abiertothey will have opened
Cond. perfectohabrían abiertothey would have opened
Subj. futuroabrieren(should) they open
Indefinidoabrieronthey opened
Imperfectoabríanthey used to open
Pluscuamp.habían abiertothey had opened
Subj. imperf.abrieran(that) they opened
Subj. -seabriesen(that) they opened
Subj. pluscuamp.hubieran abierto(that) they had opened
Pret. anteriorhubieron abiertothey had opened
Imperativoabranopen!
Imper. negativono abrandon't open
Imagen. La puerta de madera — traducido de The Wooden Door (omerify · flickr · CC0)

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