do I not check? do you not check? does she not check? do we not check? do you not check? do they not check?
Present continuous
am I not checking? are you not checking? is she not checking? are we not checking? are you not checking? are they not checking?
Preterite
did I not check? did you not check? did she not check? did we not check? did you not check? did they not check?
Preterite continuous
was I not checking? were you not checking? was she not checking? were we not checking? were you not checking? were they not checking?
Present perfect
have I not checked? have you not checked? has she not checked? have we not checked? have you not checked? have they not checked?
Present perfect continuous
have I not been checking? have you not been checking? has she not been checking? have we not been checking? have you not been checking? have they not been checking?
Pluperfect
had I not checked? had you not checked? had she not checked? had we not checked? had you not checked? had they not checked?
Pluperfect continuous
had I not been checking? had you not been checking? had she not been checking? had we not been checking? had you not been checking? had they not been checking?
Future
will I not check? will you not check? will she not check? will we not check? will you not check? will they not check?
Future continuous
will I not be checking? will you not be checking? will she not be checking? will we not be checking? will you not be checking? will they not be checking?
Future perfect
will I not have checked? will you not have checked? will she not have checked? will we not have checked? will you not have checked? will they not have checked?
Future perfect continuous
will I not have been checking? will you not have been checking? will she not have been checking? will we not have been checking? will you not have been checking? will they not have been checking?
Conditional
Present
would I not check? would you not check? would she not check? would we not check? would you not check? would they not check?
Present continuous
would I not be checking? would you not be checking? would she not be checking? would we not be checking? would you not be checking? would they not be checking?
Past
would I not have checked? would you not have checked? would she not have checked? would we not have checked? would you not have checked? would they not have checked?
Past continuous
would I not have been checking? would you not have been checking? would she not have been checking? would we not have been checking? would you not have been checking? would they not have been checking?