do I fasten? do you fasten? does she fasten? do we fasten? do you fasten? do they fasten?
Present continuous
am I fastening? are you fastening? is she fastening? are we fastening? are you fastening? are they fastening?
Preterite
did I fasten? did you fasten? did she fasten? did we fasten? did you fasten? did they fasten?
Preterite continuous
was I fastening? were you fastening? was she fastening? were we fastening? were you fastening? were they fastening?
Present perfect
have I fastened? have you fastened? has she fastened? have we fastened? have you fastened? have they fastened?
Present perfect continuous
have I been fastening? have you been fastening? has she been fastening? have we been fastening? have you been fastening? have they been fastening?
Pluperfect
had I fastened? had you fastened? had she fastened? had we fastened? had you fastened? had they fastened?
Pluperfect continuous
had I been fastening? had you been fastening? had she been fastening? had we been fastening? had you been fastening? had they been fastening?
Future
will I fasten? will you fasten? will she fasten? will we fasten? will you fasten? will they fasten?
Future continuous
will I be fastening? will you be fastening? will she be fastening? will we be fastening? will you be fastening? will they be fastening?
Future perfect
will I have fastened? will you have fastened? will she have fastened? will we have fastened? will you have fastened? will they have fastened?
Future perfect continuous
will I have been fastening? will you have been fastening? will she have been fastening? will we have been fastening? will you have been fastening? will they have been fastening?
Conditional
Present
would I fasten? would you fasten? would she fasten? would we fasten? would you fasten? would they fasten?
Present continuous
would I be fastening? would you be fastening? would she be fastening? would we be fastening? would you be fastening? would they be fastening?
Past
would I have fastened? would you have fastened? would she have fastened? would we have fastened? would you have fastened? would they have fastened?
Past continuous
would I have been fastening? would you have been fastening? would she have been fastening? would we have been fastening? would you have been fastening? would they have been fastening?