Go raibh maith agat! Ceapaim go bhfuil tuigim (and now I'm not sure about this one)! :-)
Ní féidir. When the object of a VN is a pronoun, it changes to forms like this.
How about with an adjective? For example, which of these is right: "Ba mhaith liom mo scileanna ór a choinnigh" or "Ba mhaith liom mo scileanna a choinnigh ór"