Portuguese/Present subjunctive tense irregular verbs< Portuguese
Most verbs which are irregular in the present tense can be made into the present subjunctive by removing the "o" from the first person present indicative
FAZER Eu faço (present indicative) - faç
And then adding the appropriate endings:
FAZER (present subjunctive) Eu faça Tu faças Ele faça Nós façamos Vós façais Eles façam
However, there are some exceptions. The following verbs have irregular stems. The endings, however, are regular.
SER (to be)- eu seja
ESTAR (to be)- eu esteja
HAVER (to exist)- eu haja
SABER (to know)- eu saiba
QUERER (to will)- eu queira
The following verbs are completely irregular.
DAR (to give) Eu dê Tu dês Ele dê Nós dêmos Vós deis Eles dêem
IR (to go) Eu vá Tu vás Ele vá Nós vamos Vós vades Eles vão