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