Conjugation is demonstrated here with the important irregular verb fazer, "to do": Periphrastic forms are as follows: The tenses correspond to: The five non-finite forms generally correspond to: The moods are used roughly as follows: For the Portuguese personal pronouns (which are omitted whenever they can be inferred from the ending of the conjugated verb or the context), see Portuguese personal pronouns and possessives.
There are few irregular verbs for these tenses (only dizer, fazer, trazer, and their compounds – also haver, ter, ser, ir, pôr, estar, etc.
The affirmative imperative for second person pronouns tu and vós is obtained from the present indicative, by deletion of the final -s (in some cases, an accent mark must be added to the vowel which precedes it).
As a rule of thumb, the last radical vowel (the one that can be stressed) will retain its original pronunciation when unstressed (atonic) and change into [a], [e/ɛ] (subjunctive or indicative 1st pers sing/infinitive), or [o/ɔ] (subjunctive or indicative 1st pers sing/infinitive) – depending on the vowel in question – in case it is stressed (is in a tonic syllable).
At times, the difference is not particularly clear, producing [o̞], [e̞], particularly in transition zones like the states of Rio de Janeiro, Espírito Santo, Minas Gerais and the Brazilian Federal District, unless vowel harmony is involved (e.g. comove "move, touch (emotionally)" [kɔˈmɔvi]).