RobertKaucher wrote:
He was responding to a question on iTalki. He didn't say that it was the only correct form but that the go was unnecessary. I felt he was implying that
Tá sé deas was the more common construction.
http://www.italki.com/question/278801I had just never seen the usage and thought it was odd that someone who seemed to know what he was talking about in other questions was using a construction I had never encountered in the wild.
I'm not sure what lyrics the original poster was asking about, but grammar often goes by the wayside in songs and poetry, with syllables dropping right, left, and center.
That said, the specific lyric he/she was asking about was "nach bhfuil sí deas," and it seems to me that I HAVE heard "deas" without the "go" in that context, though I can't say whether it's common or not. It doesn't sound correct to my ear, but I'd stop short of saying it's incorrect without more input. It's possible I (and the person who responded) am thinking of the copula construction "nach deas í" though. It's also possible that the song writer was confused (it looks to be a new song rather than a traditional one).
Redwolf
Edited to add: This might be a good question for the Gaeilge Amháin gang on Facebook.