The be after V-ing gram has been used in representations of Irish English since the seventeenth century. In early texts it often has future meanings that have been regarded as inauthentic because the Irish Gaelic construction that is the source of the gram is a perfect. This article accounts for the coexistence of future and perfect uses as an outcome of the interaction of two types of language transfer: the gram was ‘borrowed’ (‘pull transfer’) into English by English-speakers as well as being ‘imposed’ (‘push transfer’) on English by Gaelic-speakers.