"There is water under you. Do you swim?"
Translation:Tá uisce fút. An snámhann tú?
Is snámh supposed to act as a verb or a noun in that sentence? With the pronoun tú after it, it looks like a verb, but then you have two verbs in your sentence, but if it's a noun, then you have two nouns, but the verb bí doesn't take an object, so there is no obvious way to interpret your sentence.