I don't crumble you don't crumble he doesn't crumble we don't crumble you don't crumble they don't crumble
Present continuous
I'm not crumbling you aren't crumbling he isn't crumbling we aren't crumbling you aren't crumbling they aren't crumbling
Preterite
I didn't crumble you didn't crumble he didn't crumble we didn't crumble you didn't crumble they didn't crumble
Preterite continuous
I wasn't crumbling you weren't crumbling he wasn't crumbling we weren't crumbling you weren't crumbling they weren't crumbling
Present perfect
I haven't crumbled you haven't crumbled he hasn't crumbled we haven't crumbled you haven't crumbled they haven't crumbled
Present perfect continuous
I haven't been crumbling you haven't been crumbling he hasn't been crumbling we haven't been crumbling you haven't been crumbling they haven't been crumbling
Pluperfect
I hadn't crumbled you hadn't crumbled he hadn't crumbled we hadn't crumbled you hadn't crumbled they hadn't crumbled
Pluperfect continuous
I hadn't been crumbling you hadn't been crumbling he hadn't been crumbling we hadn't been crumbling you hadn't been crumbling they hadn't been crumbling
Future
I won't crumble you won't crumble he won't crumble we won't crumble you won't crumble they won't crumble
Future continuous
I won't be crumbling you won't be crumbling he won't be crumbling we won't be crumbling you won't be crumbling they won't be crumbling
Future perfect
I won't have crumbled you won't have crumbled he won't have crumbled we won't have crumbled you won't have crumbled they won't have crumbled
Future perfect continuous
I won't have been crumbling you won't have been crumbling he won't have been crumbling we won't have been crumbling you won't have been crumbling they won't have been crumbling
Conditional
Present
I wouldn't crumble you wouldn't crumble he wouldn't crumble we wouldn't crumble you wouldn't crumble they wouldn't crumble
Present continuous
I wouldn't be crumbling you wouldn't be crumbling he wouldn't be crumbling we wouldn't be crumbling you wouldn't be crumbling they wouldn't be crumbling
Past
I wouldn't have crumbled you wouldn't have crumbled he wouldn't have crumbled we wouldn't have crumbled you wouldn't have crumbled they wouldn't have crumbled
Past continuous
I wouldn't have been crumbling you wouldn't have been crumbling he wouldn't have been crumbling we wouldn't have been crumbling you wouldn't have been crumbling they wouldn't have been crumbling