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