Wmffre (1998:19,20)

 2.8 negation
 
 
 Nouns can be emphatically negated by the negative adjective (e')bet 'at all', e.g.,
 
 
 (36) n ø.s (ke) b~ɑŋk bed ba ke:ɣ 'there is no bank in town'
 
 
 The post-positioned negative verbal particle ke(d) can be dispensed with when (e')bet is also present in the same sentence, and is usually not found in a phrase such as 
 
 

(x)	n ø.s	d~ɛn e'bet	~ɑmə
	NEG est	personne ebet	ici
	'There is nobody here.'
	[équivalent standard: N'eus den ebet amañ- ]

 ... though the addition of ke(t) would be quite acceptable.

référence

• Wmffre, I. 1998. Central Breton. [= Languages of the World Materials 152] Unterschleißheim: Lincom Europa.