English verb conjugation
CAN CRUMP

Regular verb: crump - crumped - crumped

Affirmation

Simple form	V-ing form
I can crump you can crump he can crump we can crump you can crump they can crump	I can be crumping you can be crumping he can be crumping we can be crumping you can be crumping they can be crumping
Perfect	V-ing perfect
I can have crumped you can have crumped he can have crumped we can have crumped you can have crumped they can have crumped	I can have been crumping you can have been crumping he can have been crumping we can have been crumping you can have been crumping they can have been crumping

Negation

Simple form	V-ing form
I can't crump you can't crump he can't crump we can't crump you can't crump they can't crump	I can't be crumping you can't be crumping he can't be crumping we can't be crumping you can't be crumping they can't be crumping
Perfect	V-ing perfect
I can't have crumped you can't have crumped he can't have crumped we can't have crumped you can't have crumped they can't have crumped	I can't have been crumping you can't have been crumping he can't have been crumping we can't have been crumping you can't have been crumping they can't have been crumping

Interrogative form

Simple form	V-ing form
can I crump? can you crump? can he crump? can we crump? can you crump? can they crump?	can I be crumping? can you be crumping? can he be crumping? can we be crumping? can you be crumping? can they be crumping?
Perfect	V-ing perfect
can I have crumped? can you have crumped? can he have crumped? can we have crumped? can you have crumped? can they have crumped?	can I have been crumping? can you have been crumping? can he have been crumping? can we have been crumping? can you have been crumping? can they have been crumping?

Interro-negative form

Simple form	V-ing form
can't I crump? can't you crump? can't he crump? can't we crump? can't you crump? can't they crump?	can't I be crumping? can't you be crumping? can't he be crumping? can't we be crumping? can't you be crumping? can't they be crumping?
Perfect	V-ing perfect
can't I have crumped? can't you have crumped? can't he have crumped? can't we have crumped? can't you have crumped? can't they have crumped?	can't I have been crumping? can't you have been crumping? can't he have been crumping? can't we have been crumping? can't you have been crumping? can't they have been crumping?