Ok, I'm very confused right now. And would appreciate any help. The portuguese sentence was given to me in the audio form and I put "Abre" first, but then thought...it can't be abre because the sentence is using the "tu" form, so I thought I misheard and instead put "Abri a tua mente", which was obviously wrong. So then I thought, shouldn't the sentence be "Abres a tua mente"?
And then I looked through my book, thinking that perhaps it was the present subjunctive form which sometimes puts an "e" at the end of the verb, but my book ends up telling me that that form is actually "Abra" and even if it was tu, it would be "Abras"! what followed was a series of going through more books and attempts at looking it up on the internet, only to become extremely confused. Help.
See the conjugation for Abrir here [http://tools.verbix.com/webverbix/Portuguese.html?verb=abrir&D1=2&H1=102&portugues.arcaico=1&imageField.x=0&imageField.y=0]
You are looking for the "imperativo" (imperative in English). The imperative mood and its tense refer to commands, instructions, or requests for action.