reducir

to reducepor tiempo-ir irregular
participio reducidogerundio reduciendohe + participio he reducidoestoy + gerundio estoy reduciendo

Presentewhat is going on now

Presente

Present — what is happening now, and what happens habitually

yoreduzcoI reducenosotrosreducimoswe reduce
túreducesyou reducevosotrosreducísyou all reduce
él/ella/Ud.reducehe/she reducesellos/Uds.reducenthey reduce

Pretérito perfecto

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

yohe reducidoI have reducednosotroshemos reducidowe have reduced
túhas reducidoyou have reducedvosotroshabéis reducidoyou all have reduced
él/ella/Ud.ha reducidohe/she has reducedellos/Uds.han reducidothey have reduced

Presente de subjuntivo

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

yoreduzca(that) I reducenosotrosreduzcamos(that) we reduce
túreduzcas(that) you reducevosotrosreduzcáis(that) you all reduce
él/ella/Ud.reduzca(that) he/she reducesellos/Uds.reduzcan(that) they reduce

Perfecto de subjuntivo

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

yohaya reducido(that) I have reducednosotroshayamos reducido(that) we have reduced
túhayas reducido(that) you have reducedvosotroshayáis reducido(that) you all have reduced
él/ella/Ud.haya reducido(that) he/she has reducedellos/Uds.hayan reducido(that) they have reduced

Pasadowhat went on

Pretérito indefinido

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

yoredujeI reducednosotrosredujimoswe reduced
túredujisteyou reducedvosotrosredujisteisyou all reduced
él/ella/Ud.redujohe/she reducedellos/Uds.redujeronthey reduced

Pretérito imperfecto

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

yoreducíaI used to reducenosotrosreducíamoswe used to reduce
túreducíasyou used to reducevosotrosreducíaisyou all used to reduce
él/ella/Ud.reducíahe/she used to reduceellos/Uds.reducíanthey used to reduce

Pretérito pluscuamperfecto

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

yohabía reducidoI had reducednosotroshabíamos reducidowe had reduced
túhabías reducidoyou had reducedvosotroshabíais reducidoyou all had reduced
él/ella/Ud.había reducidohe/she had reducedellos/Uds.habían reducidothey had reduced

Imperfecto de subjuntivo (-ra)

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

yoredujera(that) I reducednosotrosredujéramos(that) we reduced
túredujeras(that) you reducedvosotrosredujerais(that) you all reduced
él/ella/Ud.redujera(that) he/she reducedellos/Uds.redujeran(that) they reduced

Imperfecto de subjuntivo (-se)

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

yoredujese(that) I reducednosotrosredujésemos(that) we reduced
túredujeses(that) you reducedvosotrosredujeseis(that) you all reduced
él/ella/Ud.redujese(that) he/she reducedellos/Uds.redujesen(that) they reduced

Pluscuamperfecto de subjuntivo

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

yohubiera reducido(that) I had reducednosotroshubiéramos reducido(that) we had reduced
túhubieras reducido(that) you had reducedvosotroshubierais reducido(that) you all had reduced
él/ella/Ud.hubiera reducido(that) he/she had reducedellos/Uds.hubieran reducido(that) they had reduced

Pretérito anterior

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

yohube reducidoI had reducednosotroshubimos reducidowe had reduced
túhubiste reducidoyou had reducedvosotroshubisteis reducidoyou all had reduced
él/ella/Ud.hubo reducidohe/she had reducedellos/Uds.hubieron reducidothey had reduced

Futurowhat will or would go on

Futuro simple

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

yoreduciréI will reducenosotrosreduciremoswe will reduce
túreducirásyou will reducevosotrosreduciréisyou all will reduce
él/ella/Ud.reduciráhe/she will reduceellos/Uds.reduciránthey will reduce

Condicional simple

Conditional — would —; also softens a request into politeness

yoreduciríaI would reducenosotrosreduciríamoswe would reduce
túreduciríasyou would reducevosotrosreduciríaisyou all would reduce
él/ella/Ud.reduciríahe/she would reduceellos/Uds.reduciríanthey would reduce

Futuro perfecto

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

yohabré reducidoI will have reducednosotroshabremos reducidowe will have reduced
túhabrás reducidoyou will have reducedvosotroshabréis reducidoyou all will have reduced
él/ella/Ud.habrá reducidohe/she will have reducedellos/Uds.habrán reducidothey will have reduced

Condicional perfecto

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

yohabría reducidoI would have reducednosotroshabríamos reducidowe would have reduced
túhabrías reducidoyou would have reducedvosotroshabríais reducidoyou all would have reduced
él/ella/Ud.habría reducidohe/she would have reducedellos/Uds.habrían reducidothey would have reduced

Futuro de subjuntivo

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

yoredujere(should) I reducenosotrosredujéremos(should) we reduce
túredujeres(should) you reducevosotrosredujereis(should) you all reduce
él/ella/Ud.redujere(should) he/she reduceellos/Uds.redujeren(should) they reduce

Imperativotelling someone to

Imperativo afirmativo

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

yo—nosotrosreduzcamoslet's reduce
túreducereduce!vosotrosreducidreduce!
él/ella/Ud.reduzcareduce!ellos/Uds.reduzcanreduce!

Imperativo negativo

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

yo—nosotrosno reduzcamoslet's not reduce
túno reduzcasdon't reducevosotrosno reduzcáisdon't reduce
él/ella/Ud.no reduzcadon't reduceellos/Uds.no reduzcandon't reduce
Imagen. preciosa luna en cuarto menguante — traducido de gorgeous half-FULL moon (jeannetteyvonne · flickr · PDM)

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

reducir

to reducepor persona-ir irregular
participio reducidogerundio reduciendohe + participio he reducidoestoy + gerundio estoy reduciendo

yo

I — the speaker

PresentereduzcoI reduce
Perfectohe reducidoI have reduced
Subj. presentereduzca(that) I reduce
Subj. perfectohaya reducido(that) I have reduced
FuturoreduciréI will reduce
CondicionalreduciríaI would reduce
Fut. perfectohabré reducidoI will have reduced
Cond. perfectohabría reducidoI would have reduced
Subj. futuroredujere(should) I reduce
IndefinidoredujeI reduced
ImperfectoreducíaI used to reduce
Pluscuamp.había reducidoI had reduced
Subj. imperf.redujera(that) I reduced
Subj. -seredujese(that) I reduced
Subj. pluscuamp.hubiera reducido(that) I had reduced
Pret. anteriorhube reducidoI had reduced
Imperativo—
Imper. negativo—

nosotros / nosotras

we — the speaker plus others

Presentereducimoswe reduce
Perfectohemos reducidowe have reduced
Subj. presentereduzcamos(that) we reduce
Subj. perfectohayamos reducido(that) we have reduced
Futuroreduciremoswe will reduce
Condicionalreduciríamoswe would reduce
Fut. perfectohabremos reducidowe will have reduced
Cond. perfectohabríamos reducidowe would have reduced
Subj. futuroredujéremos(should) we reduce
Indefinidoredujimoswe reduced
Imperfectoreducíamoswe used to reduce
Pluscuamp.habíamos reducidowe had reduced
Subj. imperf.redujéramos(that) we reduced
Subj. -seredujésemos(that) we reduced
Subj. pluscuamp.hubiéramos reducido(that) we had reduced
Pret. anteriorhubimos reducidowe had reduced
Imperativoreduzcamoslet's reduce
Imper. negativono reduzcamoslet's not reduce

tú

you (informal) — one person you are familiar with

Presentereducesyou reduce
Perfectohas reducidoyou have reduced
Subj. presentereduzcas(that) you reduce
Subj. perfectohayas reducido(that) you have reduced
Futuroreducirásyou will reduce
Condicionalreduciríasyou would reduce
Fut. perfectohabrás reducidoyou will have reduced
Cond. perfectohabrías reducidoyou would have reduced
Subj. futuroredujeres(should) you reduce
Indefinidoredujisteyou reduced
Imperfectoreducíasyou used to reduce
Pluscuamp.habías reducidoyou had reduced
Subj. imperf.redujeras(that) you reduced
Subj. -seredujeses(that) you reduced
Subj. pluscuamp.hubieras reducido(that) you had reduced
Pret. anteriorhubiste reducidoyou had reduced
Imperativoreducereduce!
Imper. negativono reduzcasdon't reduce

vosotros / vosotras

you all — informal plural, Spain only

Presentereducísyou all reduce
Perfectohabéis reducidoyou all have reduced
Subj. presentereduzcáis(that) you all reduce
Subj. perfectohayáis reducido(that) you all have reduced
Futuroreduciréisyou all will reduce
Condicionalreduciríaisyou all would reduce
Fut. perfectohabréis reducidoyou all will have reduced
Cond. perfectohabríais reducidoyou all would have reduced
Subj. futuroredujereis(should) you all reduce
Indefinidoredujisteisyou all reduced
Imperfectoreducíaisyou all used to reduce
Pluscuamp.habíais reducidoyou all had reduced
Subj. imperf.redujerais(that) you all reduced
Subj. -seredujeseis(that) you all reduced
Subj. pluscuamp.hubierais reducido(that) you all had reduced
Pret. anteriorhubisteis reducidoyou all had reduced
Imperativoreducidreduce!
Imper. negativono reduzcáisdon't reduce

él / ella / usted

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

Presentereducehe/she reduces
Perfectoha reducidohe/she has reduced
Subj. presentereduzca(that) he/she reduces
Subj. perfectohaya reducido(that) he/she has reduced
Futuroreduciráhe/she will reduce
Condicionalreduciríahe/she would reduce
Fut. perfectohabrá reducidohe/she will have reduced
Cond. perfectohabría reducidohe/she would have reduced
Subj. futuroredujere(should) he/she reduce
Indefinidoredujohe/she reduced
Imperfectoreducíahe/she used to reduce
Pluscuamp.había reducidohe/she had reduced
Subj. imperf.redujera(that) he/she reduced
Subj. -seredujese(that) he/she reduced
Subj. pluscuamp.hubiera reducido(that) he/she had reduced
Pret. anteriorhubo reducidohe/she had reduced
Imperativoreduzcareduce!
Imper. negativono reduzcadon't reduce

ellos / ellas / ustedes

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

Presentereducenthey reduce
Perfectohan reducidothey have reduced
Subj. presentereduzcan(that) they reduce
Subj. perfectohayan reducido(that) they have reduced
Futuroreduciránthey will reduce
Condicionalreduciríanthey would reduce
Fut. perfectohabrán reducidothey will have reduced
Cond. perfectohabrían reducidothey would have reduced
Subj. futuroredujeren(should) they reduce
Indefinidoredujeronthey reduced
Imperfectoreducíanthey used to reduce
Pluscuamp.habían reducidothey had reduced
Subj. imperf.redujeran(that) they reduced
Subj. -seredujesen(that) they reduced
Subj. pluscuamp.hubieran reducido(that) they had reduced
Pret. anteriorhubieron reducidothey had reduced
Imperativoreduzcanreduce!
Imper. negativono reduzcandon't reduce
Imagen. preciosa luna en cuarto menguante — traducido de gorgeous half-FULL moon (jeannetteyvonne · flickr · PDM)

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