“…According to the UPR, children cannot raise the object DP to spec, T in passives because they cannot raise it to spec, v first, since they perceive passive v to be a phase, but without features relevant for the object. A more recent proposal along similar lines is offered by Hyams, Ntelitheos & Manorohanta (2006); according to it: Children cannot form A-chains that derive a misalignment of thematic and grammatical hierarchies; that is, an external argument, if there is one, maps onto the subject (Canonical Alignment Hypothesis-CAH). Therefore, passives are not mastered early because what is mapped onto the subject position of the sentence is not the agent.…”