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Form of the present subjunctive, continued

In Unit 15, you learned that the present subjunctive form of irregular verbs can be traced back to the infinitive through the present indicative (the regular present tense). However, there are a few exceptions, listed here.  

avere                   dare                  essere

abbia                   dia                     sia

abbia                   dia                     sia

abbia                   dia                     sia

abbiamo             diamo                siamo

abbiate               diate                   siate

abbiano              diano                 siano

fare                    sapere                  stare

faccia                  sappia                  stia

faccia                  sappia                  stia

faccia                  sappia                  stia

facciamo            sappiamo              stiamo

facciate              sappiate                stiate

facciano              sappiano              stiano