English verb conjugation
CAN CLUMP

Regular verb: clump - clumped - clumped

Affirmation

Simple form	V-ing form
I can clump you can clump he can clump we can clump you can clump they can clump	I can be clumping you can be clumping he can be clumping we can be clumping you can be clumping they can be clumping
Perfect	V-ing perfect
I can have clumped you can have clumped he can have clumped we can have clumped you can have clumped they can have clumped	I can have been clumping you can have been clumping he can have been clumping we can have been clumping you can have been clumping they can have been clumping

Negation

Simple form	V-ing form
I can't clump you can't clump he can't clump we can't clump you can't clump they can't clump	I can't be clumping you can't be clumping he can't be clumping we can't be clumping you can't be clumping they can't be clumping
Perfect	V-ing perfect
I can't have clumped you can't have clumped he can't have clumped we can't have clumped you can't have clumped they can't have clumped	I can't have been clumping you can't have been clumping he can't have been clumping we can't have been clumping you can't have been clumping they can't have been clumping

Interrogative form

Simple form	V-ing form
can I clump? can you clump? can he clump? can we clump? can you clump? can they clump?	can I be clumping? can you be clumping? can he be clumping? can we be clumping? can you be clumping? can they be clumping?
Perfect	V-ing perfect
can I have clumped? can you have clumped? can he have clumped? can we have clumped? can you have clumped? can they have clumped?	can I have been clumping? can you have been clumping? can he have been clumping? can we have been clumping? can you have been clumping? can they have been clumping?

Interro-negative form

Simple form	V-ing form
can't I clump? can't you clump? can't he clump? can't we clump? can't you clump? can't they clump?	can't I be clumping? can't you be clumping? can't he be clumping? can't we be clumping? can't you be clumping? can't they be clumping?
Perfect	V-ing perfect
can't I have clumped? can't you have clumped? can't he have clumped? can't we have clumped? can't you have clumped? can't they have clumped?	can't I have been clumping? can't you have been clumping? can't he have been clumping? can't we have been clumping? can't you have been clumping? can't they have been clumping?