Examines the emergence of the present perfect in the interlanguage of adult learners of English as a Second Language (ESL). Part of a growing body of research on the acquisition of temporal expression by learners of a variety of second languages, this study explores a tense/aspect form acquired late in first language acquisition. (Author/VWL)

Examines the emergence of the present perfect in the interlanguage of instructed adult learners of English as a Second Language. Findings indicate that adding a new inflection in the tense/aspect system requires establishing new form-meaning associations as well as revising existing ones. (44 references) (Author/CK)