-ir
-er
-gir
-azer
Attention to not confuse the verbal form Trazer with the adverb Trás
-ossir
-ortir
-ervir
-ser
Extremely irregular verb with several radicals: eu serei, eu era, eu fui
-entir
-eguir
-udar
Because of the similar pronunciation it is very common to confuse the forms "eu saio" (present) with "ele saiu" (past)
-aber
Because of the similar pronunciation it is very common to confuse the forms "eu rio" (present) with "ele riu" (past)
-unir
Most common: responder, replicar
-cir
-rer
-etir
-elir
-mir
Most common: perdoar, soltar, restituir
-ar
Most common: relampejar
-ectir
Most common: pensar, meditar, considerar
-aver
-erer
Querer as na irregular verb, presents a change in a radical quer- and quis-
-ger
-ibir
-enir
-erir
-ôr
The circumflex accent of Pôr acts as a differential accent of the preposition por
-olir
Polir, as an irregular verb, presents a change in the radical pol- and pul
-oder
Poder, as an irregular verb, presents some changes in the radical pod-, pud- and poss-
-der
-dir
Pedir, as an irregular verb presents a change in some words between d and ç
-vir
Ouvir, as an irregular verb presents a change in the radical ouv- and ouç-
-iar
-car
-oer
-estir
-ugir
Fugir is written with g, however, must be written with j before the vowel a and before the vowel o
Fazer, to indicate elapsed time, must be conjugated in the third singular person: faz cinco dias, faz quatro horas, faz dez anos
-guir
Estar, daily basis, usually occurs the suppression of the first syllable of the verb estar: tá. Tá demorando, Tá chovendo, tá trabalhando
-ever
-uer
-upir
-ormir
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.
-zer
-ertir
-ergir
-uir
-obrir
Dar presents changes on its radical when conjugated in a subjunctive
Most common: traficar, agenciar, negociar
-çar
Começar presents and irregularity which consists the exchange of the consonant ç to the consonant c before the vowel
-erzir
Caber is na irregular verb and presents changes on its radical: caib- and coub-
-ulir
Most common: ajustar, combinar, conciliar
-uar
-uir/üir
-cer
Most common: agradar, apreciar, satisfazer
-or
-edir
In some modes the vowel e should be exchanged by the vowel i
-udir
Acudir presents irregular forms in the present indicative and imperative affirmative modes. You need to exchange the vowel u for the vowel o.
-rir
