%0 Journal Article %A Theakston, Anna L. %A Lieven, Elena %+ Department of Developmental and Comparative Psychology, Max Planck Institute for Evolutionary Anthropology, Max Planck Society %T The acquisition of auxiliaries BE and HAVE: an elicitation study : %G eng %U https://hdl.handle.net/11858/00-001M-0000-0010-02AA-8 %F EDOC: 251504 %R 10.1017/S0305000905006872 %D 2005 %* Review method: peer-reviewed %K Language impairment ; Present perfect ; English ; Children ; Questions ; Inflection ; Inversion ; Account ; Verbs. %J Journal of Child Language %O J. Child Lang. %V 32 %N 3 %& 587 %P 587 - 616 %I Cambridge University Press. %C London %@ 0305-0009