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 cannot crump you cannot crump he cannot crump we cannot crump you cannot crump they cannot crump	I cannot be crumping you cannot be crumping he cannot be crumping we cannot be crumping you cannot be crumping they cannot be crumping
Perfect	V-ing perfect
I cannot have crumped you cannot have crumped he cannot have crumped we cannot have crumped you cannot have crumped they cannot have crumped	I cannot have been crumping you cannot have been crumping he cannot have been crumping we cannot have been crumping you cannot have been crumping they cannot 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 I not crump? can you not crump? can he not crump? can we not crump? can you not crump? can they not crump?	can I not be crumping? can you not be crumping? can he not be crumping? can we not be crumping? can you not be crumping? can they not be crumping?
Perfect	V-ing perfect
can I not have crumped? can you not have crumped? can he not have crumped? can we not have crumped? can you not have crumped? can they not have crumped?	can I not have been crumping? can you not have been crumping? can he not have been crumping? can we not have been crumping? can you not have been crumping? can they not have been crumping?