(IP (NP-SBJ *exp*)
    (SR ...)
    (clefted XP)
    (CP-CLF (WXP-1 ...)
	    (IP-SUB (XP *T*-1)
          	    (...)))
    (. .))

( (IP-MAT (NP-SBJ-2 *exp*)
	  (SR-D Foi)
	  (NP-2 (PRO ele))                                                    ☜ agreeing NP (coindexed with the expletive subject)
	  (CP-CLF (WNP-1 (WPRO quem))
		  (IP-SUB (NP-SBJ *T*-1)          ☜ NP gap; function: subject
			  (NP-ACC (CL me))
			  (VB-D crismou)))
	  (, ,))
  (TYCHO BRAHE; ID A_003_PSD,70.1059))

( (IP-MAT-SPE (NP-SBJ-2 *exp*)
	      (ADVP (ADV porém))
	      (NEG não)
	      (SR-P é)
	      (NP-2 (DEM isso))                                        ☜ agreeing NP (coindexed with the expletive subject)
	      (CP-CLF (WNP-1 (D o) (WPRO que))
		      (IP-SUB (NP-ACC *T*-1)            ☜ NP gap; function: object
			      (NP-SBJ (PRO eu))
			      (VB-P pergunto)))
	      (. .))
  (TYCHO BRAHE; ID C_001_PSD,27.464))

( (IP-MAT (NP-SBJ-2 *exp*)
	  (NEG Não)
	  (SR-P são)
	  (NP-2 (NP (D o) (N amor))                                ☜ agreeing NP (coindexed with the expletive subject)
		(CONJP (CONJ-NEG nem)
		       (NP (D-F a) (N fortuna))))
	  (CP-CLF (WNP-1 (D-P os) (WPRO que))
		  (IP-SUB (NP-SBJ *T*-1)                     ☜ NP gap; function: subject
			  (VB-P correspondem)
			  (PP (P a@)
			      (NP (D-P @os) (N-P merecimentos)))))
	  (. .))
  (TYCHO BRAHE; ID C_001_PSD,13.244))

 
See also
Subjects in 'ser' constructions
Subject that clauses
Subject infinitival clauses
Clefted constituents – Summary