Suggested Answers for Check Questions

PRO is an empty (unpronounced) DP. It can only appear in the subject position of non-finite clauses, not elsewhere (i.e. as subject of a finite clause or object or object of a preposition). The subject positions of non-finite clauses where it can occur are positions to which Null Case is assigned. PRO can have arbitrary reference when it is interpreted as having some generic referent. However, it can also be coreferent with a subject or an object. In some contexts both arbitrary reference and obligatory coreference to an antecedent are allowed at the same time, e.g. They discussed growing a moustache – this could be interpreted either as growing a moustache in general or them growing a moustache.