“…Previous studies on attrition suggest that even such central properties of grammar can be subject to processes of language loss. Subject-verb agreement and case marking are often affected to various degrees, more in incomplete acquisition (Polinsky, 2006a(Polinsky, , 2007a(Polinsky, , 2008 and child language attrition (Anderson, 2001;Bolonyai, 2000Bolonyai, , 2002, less in adult attrition (Levine, 2000;Pelc, 2002;Schmid, 2002;Schmitt, 2004), with patterns of omission and use of incorrect markers. Allen et al (2006) show that case and agreement can be affected even in highproficiency incomplete acquisition in Inuktitut.…”