There is indication that these results may be applied to any L1 group acquiring English (Dulay and Burt, 1974;Dulay and Burt, 1975), and some research has focused on developing a general account of acquisition across a broad range of morphosyntactic structures (cf.
up until now we have only gathered information on the errors committed by our learner population, and thus we still have no information on a great deal of grammatical constructions.