-ir
advir | convir | intervir | provir | sobrevir
-er
antever | entrever | prever | rever
acender | acolher | anteceder | apreender | aprender
equivaler
-gir
atingir | cingir | compungir | fingir | impingir
-azer
trazer
Attention to not confuse the verbal form Trazer with the adverb Trás
conduzir | deduzir | induzir | introduzir | produzir
-ossir
tossir
conter | deter | entreter | manter | obter
-ubir
subir
-ortir
sortir
-ervir
servir
-ser
ser
Extremely irregular verb with several radicals: eu serei, eu era, eu fui
-entir
consentir | desmentir | pressentir | assentir | dissentir
-eguir
conseguir | perseguir | prosseguir
-udar
amiudar
abstrair | atrair | contrair | descontrair | distrair
Because of the similar pronunciation it is very common to confuse the forms "eu saio" (present) with "ele saiu" (past)
-aber
saber
adquirir | cobrir | colorir | cumprir | descolorir
Because of the similar pronunciation it is very common to confuse the forms "eu rio" (present) with "ele riu" (past)
-unir
brunir | desunir | munir | punir | unir
extorquir
Most common: responder, replicar
-cir
ressarcir
-rer
requerer
-etir
competir
-elir
compelir | expelir
-mir
premir | fremir
Most common: perdoar, soltar, restituir
-ar
relampaguear
-ectir
reflectir
Most common: pensar, meditar, considerar
coligir
acarear | alardear | altear | aperrear | arear
Most common: relampejar
-aver
reaver
-erer
querer
Querer as an irregular verb, presents a change in a radical quer- and quis-
desprover
-ger
abranger | constranger | desproteger | eleger | ranger
-ibir
coibir | desinibir | exibir | inibir
-enir
prevenir
-erir
aferir | auferir | conferir | deferir | desferir
precaver
prazer
-ôr
pôr
The circumflex accent of pôr helps to differentiate the verb from the preposition por
-olir
engolir
Polir, as an irregular verb, presents a change in the radical pol- and pul-
-oder
poder
Poder, as an irregular verb, presents some changes in the radical pod-, pud- and poss-
atordoar | doar | galardoar
-der
perder
-dir
desimpedir | despedir | expedir | impedir | medir
Pedir, as an irregular verb presents a change in some forms between d and ç
-uvir
ouvir
Ouvir, as an irregular verb presents a change in the radical ouv- and ouç-
-iar
odiar
-car
neviscar
-oer
remoer
reler
jazer
ir
-estir
revestir | vestir
espargir
haver
abolir | admitir | advertir | aluir | aplaudir
-ugir
fugir
Fugir is written with g, however, must be written with j before the vowel a and before the vowel o
afligir | erigir | exigir | infligir
abarcar | abdicar | abjudicar | açambarcar | achacar
afazer | contrafazer | desfazer | liquefazer | perfazer
falir
-guir
distinguir
estar
Estar has its own conjugation pattern. In everyday communication it usually undergoes a suppression of the first syllable leaving only tá. Tá demorando, tá chovendo, tá trabalhando
-ever
circunscrever | descrever | inscrever | manuscrever | prescrever
-uer
erguer
-upir
desentupir | engrupir
-ormir
dormir
Dormir is written with u only in some irregular forms of the present indicative, present subjunctive and imperative: Eu durmo, que eles durmam, durma você
doer
-zer
bendizer | contradizer | desdizer | maldizer | predizer
-ertir
divertir
-ergir
aspergir | submergir | convergir | emergir
atribuir | contribuir | diminuir | imbuir | retribuir
-uir
construir | desobstruir | fruir | instruir | obstruir
constituir | instituir | prostituir | reconstituir | restituir
-espir
despir
-obrir
descobrir
delinquir
dar
Dar presents changes on its radical when conjugated in subjunctive
descrer
dirigir
abater | absolver | absorver | acometer | bater
assoprar | estuprar | soprar
consorciar | divorciar
Most common: traficar, agenciar, negociar
-çar
abagunçar | abraçar | adereçar | adoçar | afiançar
Começar presents an irregularity which consists in the exchange of the consonant ç to the consonant c before the vowel e
chover
abnegar | abrigar | ab-rogar | aconchegar | advogar
-erzir
cerzir
caber
Caber is an irregular verb and presents changes in its radical: caib- and coub-
-ulir
escapulir
avir
Most common: ajustar, combinar, conciliar
-uar
averiguar
redarguir
-cer
aquecer
aprazer
Most common: agradar, apreciar, satisfazer
abafar | abaixar | abalar | abalroar | abanar
-or
compor | contrapor | decompor | depor | descompor
-edir
transgredir | progredir | regredir
coagir | infringir | restringir | interagir | reagir
adequar
-udir
sacudir
abastecer | aborrecer | acrescer | adoecer | agradecer
-rir
reabrir
