... Dulay and Marina K Burt 1975 Natural sequences in child second language acquisition Language Learning, 24(1) Susan Gass 1979 Language transfer and universal grammatical relations Language Learning, ... the need for a description of the general progress of English acquisition as determined by the mastery of grammatical forms Goal : to have error profiles that indicate what level of acquisition ... Modeling, pages 59– 66, Kailua-Kona, Hawaii, January 2-5 UM96, User Modeling, Inc Lisa N Michaud and Kathleen F McCoy 1999 Modeling user language proficiency in a writing tutor for deaf learners of English...