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