don't I crumble? don't you crumble? doesn't he crumble? don't we crumble? don't you crumble? don't they crumble?
Presente continuo
am I not crumbling? aren't you crumbling? isn't he crumbling? aren't we crumbling? aren't you crumbling? aren't they crumbling?
Pretérito
didn't I crumble? didn't you crumble? didn't he crumble? didn't we crumble? didn't you crumble? didn't they crumble?
Pretérito continuo
wasn't I crumbling? weren't you crumbling? wasn't he crumbling? weren't we crumbling? weren't you crumbling? weren't they crumbling?
Presente perfecto
haven't I crumbled? haven't you crumbled? hasn't he crumbled? haven't we crumbled? haven't you crumbled? haven't they crumbled?
Presente perfecto continuo
haven't I been crumbling? haven't you been crumbling? hasn't he been crumbling? haven't we been crumbling? haven't you been crumbling? haven't they been crumbling?
Pluscuamperfecto
hadn't I crumbled? hadn't you crumbled? hadn't he crumbled? hadn't we crumbled? hadn't you crumbled? hadn't they crumbled?
Pluscuamperfecto continuo
hadn't I been crumbling? hadn't you been crumbling? hadn't he been crumbling? hadn't we been crumbling? hadn't you been crumbling? hadn't they been crumbling?
Futuro simple
won't I crumble? won't you crumble? won't he crumble? won't we crumble? won't you crumble? won't they crumble?
Futuro continuo
won't I be crumbling? won't you be crumbling? won't he be crumbling? won't we be crumbling? won't you be crumbling? won't they be crumbling?
Futuro perfecto
won't I have crumbled? won't you have crumbled? won't he have crumbled? won't we have crumbled? won't you have crumbled? won't they have crumbled?
Futuro perfecto contínuo
won't I have been crumbling? won't you have been crumbling? won't he have been crumbling? won't we have been crumbling? won't you have been crumbling? won't they have been crumbling?
Condicional
Presente
wouldn't I crumble? wouldn't you crumble? wouldn't he crumble? wouldn't we crumble? wouldn't you crumble? wouldn't they crumble?
Presente continuo
wouldn't I be crumbling? wouldn't you be crumbling? wouldn't he be crumbling? wouldn't we be crumbling? wouldn't you be crumbling? wouldn't they be crumbling?
Passado
wouldn't I have crumbled? wouldn't you have crumbled? wouldn't he have crumbled? wouldn't we have crumbled? wouldn't you have crumbled? wouldn't they have crumbled?
Passado continuo
wouldn't I have been crumbling? wouldn't you have been crumbling? wouldn't he have been crumbling? wouldn't we have been crumbling? wouldn't you have been crumbling? wouldn't they have been crumbling?