"The elephants do not speak."
Translation:Elefanterna talar inte.
The reason it's totally impossible here is the V2 rule: in main clauses (that are not questions), the verb absolutely has to go in second place.
In subclauses, the V2 rule does not apply, and the rule is that inte always goes before the verb.
Main clause: Jag läser inte 'I am not reading'
Subclause: Om du inte läser … 'If you're not reading …' (a subclause cannot function on its own so imagine it being followed by the rest of the sentence).