12.1.2.2 Referential subject with inflected infinitive (NP-SBJ *pro*)

Referential null subjects (labelled *pro*) are annotated when the infinitive verb is overtly inflected.
( (IP-MAT (NP-SBJ *pro*)
(VB-RA Quisera)
(IP-INF (VB dar)
(NP-DAT (CL vos))
(NP-ACC (D-UM-F uma) (N regra)))
(PP (P para)
(IP-INF (NP-SBJ *pro*)
(VB-F conhecerdes)                                                            ☜ overtly inflected infinitive (2nd person plural)
(NP-ACC (D-P estes)
(N-P representantes)
(PP (P d@)
(NP (D @o) (N terno))))))
(, ,))
(TYCHO BRAHE; ID C_001_PSD,02.25))

( (IP-MAT (ADVP (ADV Ainda))
(NP-SBJ (D o)
(N pessoal))
(PP (P @a)
(NP (D-F-P @as)
(N-P vezes)))
(FP até)
(VB-D-3S pedia)
(NP-ACC (D-UM-F uma)
(N rajadinha)
(PP (P de)
(NP (N vento))))
(, ,)
(PP (P para)
(IP-INF (NP-SBJ *pro*)
(NEG não)
(VB-F-1P remarmos)))                          ☜ overtly inflected infinitive (1st person plural)
  (. .))
(CORDIAL-SIN; ID VPA41,10))

( (IP-MAT (IP-MAT (CONJ E)
(CP-ADV (C se)
(IP-SUB (VB-SR partir)
(PP (P de@)
(ADVP (ADV @aqui)))
(NP-SBJ (D-F a) (N citatória))))
(, ,)
(NP-SBJ (PRO eu))
(NP-ACC (CL vos))
(VB-R avisarei)
(PP (P para)
(IP-INF (NP-SBJ *pro*)
(ADVP (ADV lá))
(VB-F pedires)                          ☜ overtly inflected infinitive (2nd person singular)
                              (NP-ACC (N volta)
(PP (P de@)
(NP (PRO @ela)))))))
(CONJP (CONJ e)
(IP-MAT (NP-SBJ *pro*)
(, ,)
(CP-ADV (C como)
(IP-SUB (NP-SBJ *pro*)
(NEG não)
(VB-D sabia)
(CP-QUE (WADVP-1 (WADV onde))
(IP-SUB (ADVP *T*-1)
(NP-SBJ (PRO ele))
(ET-D estava)))))
(, ,)
(NP-DAT (CL lhe))
(VB-D dei)
(NP-ACC (D-F a)
(PP (P de@)
(NP (D-F-P @as)
(NPR (NPR-P Escolas) (NPR-P Gerais)))))))
(. .))
(POST SCRIPTUM; ID CARDS0183,.6))

( (IP-MAT (CONJ E)
(NP-SBJ (D-P os)
(N-P fidalgos)
(PP (P de)
(NP (NPR Castella))))
(VB-D ajuntarõ@)
(NP-ACC (CL @sse))
(ADVP (ADV entom))
(PP (P pera)
(IP-INF (NP-SBJ *pro*)
(HV-F averẽ)                                                                         ☜ overtly inflected infinitive (3rd person plural)
                                            
 (NP-ACC (PRO$ seu) (N acordo))
(PP (P em)
(NP (N razõ)
(PP (P de@)
(NP (D-F @a)
(N prisom)
(PP (P de@)
(NP (D @o) (N conde)))))))))
(. .))
(WOChWEL; ID CGE344,.49))
Notice that in the case of 1st or 3rd person singular infinitive forms, no null subject is annotated:
( (CP-D (C Porque)
(IP-IND (NP-SBJ (D o)
(N porco))
(PP (P para)
(IP-INF (VB-F-3S engordar)                        ☜ no null subject added (3rd person singular infinitive)
(ADVP (ADV bem))))
(TR-P-3S tem)
(CP-THT (C que)
(IP-INF (SR ser)
(ADJP-PRD (Q muito)
(VB-AN acarinhado)))))
(. .))
(CORDIAL-SIN; ID LVR18,107))