“…In sum, the grammatical constraint on wanna contraction involves a learnability issue. Although a number of empirical studies on wanna contraction have attempted to investigate whether knowledge of the constraint might exist among both L1-English children (e.g., Crain & Thornton, 1998;Getz, 2019;Thornton, 1990;Zukowski & Larsen, 2011) and L2ers of English (e.g., Ito, 2018;Kweon, 2000;Kweon & Bley-Vroman, 2011;Witzel & Witzel, 2008), their findings have been inconsistent, making further work necessary.…”