“…Explicit formfocused instruction (FFI), in which 'learners are encouraged to develop metalinguistic awareness of the rule' (Ellis, 2008, p. 438), has generally been found to be beneficial to second language acquisition (SLA) (Ellis, 2008;Norris & Ortega, 2000;Spada, 2011;Spada & Tomita, 2010). However, results of empirical studies suggest that explicit FFI may have differential effects on different language domains; that is, in comparison with lexical items, grammatical forms might be less susceptible to explicit FFI.…”