Dia daoibh arís.

I could have sworn I came across this the other day but I can't remember where so I'll just use the following as an example;

''Is maith liom a bheith i mbun oibre.''
''Is maith liom bheith i mbun oibre.''

Do you need the ''a'' again I can't find the specific example but I could have sworn I've come across examples that leave it out.

GRMA

In Standard Irish there's no need for "a".
But in the dialects, esp. Connacht/Ulster, "a" is usually there.

Is the "a", whether included or omitted, the reason for the leniting beith?

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Roibeard

Beith is now permanently lenited due to so commonly occuring after 'a', you'll see beith in some 17th and 18th century texts.

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The dialect I use is Cork Irish.
Ar sgáth a chéile a mhairid na daoine, lag agus láidir, uasal is íseal

Go raibh maith agat a Labhráis

How gross...

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ЯГОН ТОҶИК НЕСТ ИНҶО???