do I not ensure? do you not ensure? does he not ensure? do we not ensure? do you not ensure? do they not ensure?
Present continuous
am I not ensuring? are you not ensuring? is he not ensuring? are we not ensuring? are you not ensuring? are they not ensuring?
Preterite
did I not ensure? did you not ensure? did he not ensure? did we not ensure? did you not ensure? did they not ensure?
Preterite continuous
was I not ensuring? were you not ensuring? was he not ensuring? were we not ensuring? were you not ensuring? were they not ensuring?
Present perfect
have I not ensured? have you not ensured? has he not ensured? have we not ensured? have you not ensured? have they not ensured?
Present perfect continuous
have I not been ensuring? have you not been ensuring? has he not been ensuring? have we not been ensuring? have you not been ensuring? have they not been ensuring?
Pluperfect
had I not ensured? had you not ensured? had he not ensured? had we not ensured? had you not ensured? had they not ensured?
Pluperfect continuous
had I not been ensuring? had you not been ensuring? had he not been ensuring? had we not been ensuring? had you not been ensuring? had they not been ensuring?
Future
will I not ensure? will you not ensure? will he not ensure? will we not ensure? will you not ensure? will they not ensure?
Future continuous
will I not be ensuring? will you not be ensuring? will he not be ensuring? will we not be ensuring? will you not be ensuring? will they not be ensuring?
Future perfect
will I not have ensured? will you not have ensured? will he not have ensured? will we not have ensured? will you not have ensured? will they not have ensured?
Future perfect continuous
will I not have been ensuring? will you not have been ensuring? will he not have been ensuring? will we not have been ensuring? will you not have been ensuring? will they not have been ensuring?
Conditional
Present
would I not ensure? would you not ensure? would he not ensure? would we not ensure? would you not ensure? would they not ensure?
Present continuous
would I not be ensuring? would you not be ensuring? would he not be ensuring? would we not be ensuring? would you not be ensuring? would they not be ensuring?
Past
would I not have ensured? would you not have ensured? would he not have ensured? would we not have ensured? would you not have ensured? would they not have ensured?
Past continuous
would I not have been ensuring? would you not have been ensuring? would he not have been ensuring? would we not have been ensuring? would you not have been ensuring? would they not have been ensuring?