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