do I not fasten? do you not fasten? does he not fasten? do we not fasten? do you not fasten? do they not fasten?
Presente continuo
am I not fastening? are you not fastening? is he not fastening? are we not fastening? are you not fastening? are they not fastening?
Pretérito
did I not fasten? did you not fasten? did he not fasten? did we not fasten? did you not fasten? did they not fasten?
Pretérito continuo
was I not fastening? were you not fastening? was he not fastening? were we not fastening? were you not fastening? were they not fastening?
Presente perfecto
have I not fastened? have you not fastened? has he not fastened? have we not fastened? have you not fastened? have they not fastened?
Presente perfecto continuo
have I not been fastening? have you not been fastening? has he not been fastening? have we not been fastening? have you not been fastening? have they not been fastening?
Pluscuamperfecto
had I not fastened? had you not fastened? had he not fastened? had we not fastened? had you not fastened? had they not fastened?
Pluscuamperfecto continuo
had I not been fastening? had you not been fastening? had he not been fastening? had we not been fastening? had you not been fastening? had they not been fastening?
Futuro simple
will I not fasten? will you not fasten? will he not fasten? will we not fasten? will you not fasten? will they not fasten?
Futuro continuo
will I not be fastening? will you not be fastening? will he not be fastening? will we not be fastening? will you not be fastening? will they not be fastening?
Futuro perfecto
will I not have fastened? will you not have fastened? will he not have fastened? will we not have fastened? will you not have fastened? will they not have fastened?
Futuro perfecto contínuo
will I not have been fastening? will you not have been fastening? will he not have been fastening? will we not have been fastening? will you not have been fastening? will they not have been fastening?
Condicional
Presente
would I not fasten? would you not fasten? would he not fasten? would we not fasten? would you not fasten? would they not fasten?
Presente continuo
would I not be fastening? would you not be fastening? would he not be fastening? would we not be fastening? would you not be fastening? would they not be fastening?
Passado
would I not have fastened? would you not have fastened? would he not have fastened? would we not have fastened? would you not have fastened? would they not have fastened?
Passado continuo
would I not have been fastening? would you not have been fastening? would he not have been fastening? would we not have been fastening? would you not have been fastening? would they not have been fastening?