If they are post pubescent, they may well retain an accent of some kind, but they can pick up enough language to satisfy their communicative needs. In fact, some are natural acquirers who become highly proficient in this manner. In contrast, there are learners whose entire exposure to the new language comes in the form of classroom instruction in lexi-cogrammar. | Chapter 7 The Tense and Aspect System 135 Comrie B. 1976 . Aspect An Introduction to the Study of Verbal Aspect and Related Problems. New York Cambridge University Press. Hirtle W. 1967 . The Simple and Progressive Forms An Analytical Approach. Quebec Laval University Press. McCoard R. W. 1978 . The English Perfect Tense Choice and Pragmatic Inferences. Amsterdam North Holland Publishing Comany. Scheffer J. 1975 . The Progressive in English. Amsterdam North Holland Publishing Company. Smith C. 1983 . A Theory of Aspectual Choice. Language 59 3 479-501. For useful descriptions of the English tense-aspect system consult the following sources Allen R. L. 1966 . The Verb System of Present-Day American English. The Hague Mouton. Comrie B. 1985 . Tense. New York Cambridge University Press. Joos M. 1968 . The English Verb Form and Meanings . Madison Wis. University of Wisconsin Press. Leech G. 1987 . Meaning and the English Verb 2d ed. . London Longman. Lewis M. 1986 . The English Verb. Hove Language Teaching Publications. Palmer F. R. 1968 . A Linguistic Study of the English Verb. Coral Gables Fla. The University of Miami Press. For a discussion of the differences between will and be going to see Binnick R. 1971 . WiZZand Be Going To. Papers from the 7th Regional Meeting Chicago Linguistic Society. Chicago Chicago Linguistic Society. Binnick R. 1972 . Wi ZZ and Be Going To vol. 2 . Papers from the 8th Regional Meeting Chicago Linguistic Society. Chicago Chicago Linguistic Society. Foran in depth study of stativeprogressives see Gavis W. Forthcoming . Stative Verbs in the Be -ing Progressive Form. Unpublished Ph. D. Dissertation. Teachers College Columbia University. For helpful pedagogical analyses see Feigenbaum I. 1981 . The Use of the English Perfect. Language Learning 31 2 393-408. Martin M. 1978 . Future Shock A Pedagogical Analysis of WzZZand Be Going 7b. In C. Blatchford and J. Schachter eds. On TESOL 78. Washington 183-190. Richards J. 1979 . .
