fio_smiles wrote:Alrighty! Thanks Raic!
And one last thrash of the dead horse.... with prepositions like le, when you are using the possessives.... they have the same mutation on the following noun as just using the possessive pronoun?
mo theach - le mo theach
do theach - le do theach
a theach - lena theach (his)
a teach - lena teach (her)
ár dteach - lenár dteach
bhur dteach - le bhur dteach
a dteach - lena dteach (their)
That is correct.
fio_smiles wrote:And are these technically dative rather than nominative ?

Not really. Cases are constructs defined by languages in order to convey information via inflection. As such, the moment there is no separate
ending anymore the case ceases to exist. Old Irish used to have an accusative case designed to reflect the noun acts as object in the sentence.
Yet we wouldn't say that in a sentence like
cheannaigh mé leabhar that
leabhar is technically accusative case. This would be rather meaningless as definitions of cases differ per language (as I remarked earlier, the Irish dative doesn't typically work like an average dative in other languages), so saying that a word should be in a specific case has meaning if and only if the case has been defined by grammatical rules. This is no longer the case for accusative nor dative in irish. When a merger between nominative and another case takes place, the resulting case is invariably called nominative - even though its functionality expanded beyond that of the original nominative case.