§ 679. The past tense of is is ba (bo, almost like bu in but); as, ba linn an áit, the place was ours.
§ 680. This ba causes aspiration of the first consonant of the following adjective: as ba ḋeas (yas) an áit í, it was a nice place; ba ṁaiṫ (wah) liom sin, I like that. Words beginningw ith t are not usually aspirated.
§ 681. When the adjective following begins with a vowel or f (which, of course, becomes aspirated and thus silent), the a of ba is omitted, as b'olc (bŭlk) liom sin, I did not like that; b'ḟearr (baar) liom Cormac ná Seumas, I preferred Cormac to James.
§ 682. Is olc le Niall an fíon úd, Niall thinks that wine is bad, does not like it. Ní h-olc liom sin, I rather like that, I don't think it bad.
§ 684. Is aoiḃinn (ee'-vin) duit, 'tis well for you, or is maiṫ ḋuit. So ní h-aoiḃinn dó, it is not well for him; b'aoiḃinn (bee'-vin) dóiḃ, it was well for them.
§ 685. Ba is also the conditional mood of is = would be; ba ḋeas an rud é, it would be a nice thing; ba ṁaiṫ liom dul a ḃaile, I should like to go home; b'ḟiú (bew) ḋuit dul go Baile-Áṫa-Cliaṫ, It would be worth your while (worthy for you) to go to Dublin.
This word is also spelled baḋ and buḋ in many books, etc.
as in English