Negation
From Scottish Gaelic Grammar Wiki
Negation in Scottish Gaelic can occur at the clausal level, the constituent level, or at the word level.
At the sentence level, a negative particle precedes the entire clause:
CHAN signifies a negative, declarative clause.
chan | eil | iad | gu math | |||
NEG | are | they | well | |||
'They are not well.' |