Soo-Ok Kweon. 2001. UG Availability and Wanna Contraction. Studies in Modern Grammar 24, 203-223. This paper investigates the acquisition of wanna contraction in English by adult L2 learners to see whether they correctly apply the constraint on contraction. Want to can be contracted to wanna in object extraction question, such as (1) Who do you want to/wanna kiss? However, want to cannot be contracted to wanna in subject extraction question as in (2) Who do you want to/*wanna kiss Bill? A prominent constraint on this phenomenon is based on the trace theory of movement rules (Lightfoot 1976; Chomsky 1980; Jeaggli 1980). If UG guides L2 acquisition, the learners will obey the constraint. High-proficiency Korean adult learners of English were tested on contraction in possible and impossible situations. Subjects were placed into four categories based on the contraction pattern they showed on the tests. While some subjects followed the UG-compatible pattern, many did not. This calls into question the general availability of UG.