I checked for examples of VN complements with do-gni in my thesis. My
data was limited but in OI and MiI do-gni is almost exclusively
causative and takes finite complements. The earliest example I have of
(causative, not periphrastic) do-gni + VN is from Gaelic Maundeville
(1475): doníat na hIdail a clann do baisted 'the Jews had their children
I mention an example of aspectual do-gni (meaning "does, is wont to") in
Betha Colaim Chille (1532) but unfortunately the example itself is not
in my text (CC382.10).
Reference: Inge Genee: Sentential complementation in a functional
grammar of Irish. The Hague: Holland Academic Graphics 1998.
> Elliott Lash wrote:
>> a) The use of do-gni + VN is attested rather early in Irish. I
>> remember seeing a few examples from Saltair na Rann