"The snake is not here."
Translation:Chan eil an nathair an seo.
In common with all verbs in all tenses in Gaelic (apart from the imperative), cha(n) marks a negative statement, and nach a negative question. You will meet nach later in negative relative clauses.
Chan eil an nathair an-seo 'The snake isn't here'
Nach eil an nathair an-seo? 'Isn't the snake here?'
Thuirt i nach eil an nathair an-seo 'She said that the snake isn't here'