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