don't I fortify? don't you fortify? doesn't she fortify? don't we fortify? don't you fortify? don't they fortify?
Present continuous
am I not fortifying? aren't you fortifying? isn't she fortifying? aren't we fortifying? aren't you fortifying? aren't they fortifying?
Preterite
didn't I fortify? didn't you fortify? didn't she fortify? didn't we fortify? didn't you fortify? didn't they fortify?
Preterite continuous
wasn't I fortifying? weren't you fortifying? wasn't she fortifying? weren't we fortifying? weren't you fortifying? weren't they fortifying?
Present perfect
haven't I fortified? haven't you fortified? hasn't she fortified? haven't we fortified? haven't you fortified? haven't they fortified?
Present perfect continuous
haven't I been fortifying? haven't you been fortifying? hasn't she been fortifying? haven't we been fortifying? haven't you been fortifying? haven't they been fortifying?
Pluperfect
hadn't I fortified? hadn't you fortified? hadn't she fortified? hadn't we fortified? hadn't you fortified? hadn't they fortified?
Pluperfect continuous
hadn't I been fortifying? hadn't you been fortifying? hadn't she been fortifying? hadn't we been fortifying? hadn't you been fortifying? hadn't they been fortifying?
Future
won't I fortify? won't you fortify? won't she fortify? won't we fortify? won't you fortify? won't they fortify?
Future continuous
won't I be fortifying? won't you be fortifying? won't she be fortifying? won't we be fortifying? won't you be fortifying? won't they be fortifying?
Future perfect
won't I have fortified? won't you have fortified? won't she have fortified? won't we have fortified? won't you have fortified? won't they have fortified?
Future perfect continuous
won't I have been fortifying? won't you have been fortifying? won't she have been fortifying? won't we have been fortifying? won't you have been fortifying? won't they have been fortifying?
Conditional
Present
wouldn't I fortify? wouldn't you fortify? wouldn't she fortify? wouldn't we fortify? wouldn't you fortify? wouldn't they fortify?
Present continuous
wouldn't I be fortifying? wouldn't you be fortifying? wouldn't she be fortifying? wouldn't we be fortifying? wouldn't you be fortifying? wouldn't they be fortifying?
Past
wouldn't I have fortified? wouldn't you have fortified? wouldn't she have fortified? wouldn't we have fortified? wouldn't you have fortified? wouldn't they have fortified?
Past continuous
wouldn't I have been fortifying? wouldn't you have been fortifying? wouldn't she have been fortifying? wouldn't we have been fortifying? wouldn't you have been fortifying? wouldn't they have been fortifying?