Universal 395: participles ⇒ nominalized verb forms
Original
If a language has a morphological means to indicate verbal modification (i.e., if a language has participles), then it has a morphological means to indicate verbal reference (i.e., a language has nominalized verb forms).
Standardized
IF there are morphological means to indicate verbal modification (i.e., participles), THEN there are morphological means to indicate verbal reference (i.e., nominalized verb forms).