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