English verb conjugation
CAN LONGJUMP

Regular verb: longjump - longjumped - longjumped

Affirmation

Simple form	V-ing form
I can longjump you can longjump he can longjump we can longjump you can longjump they can longjump	I can be longjumping you can be longjumping he can be longjumping we can be longjumping you can be longjumping they can be longjumping
Perfect	V-ing perfect
I can have longjumped you can have longjumped he can have longjumped we can have longjumped you can have longjumped they can have longjumped	I can have been longjumping you can have been longjumping he can have been longjumping we can have been longjumping you can have been longjumping they can have been longjumping

Negation

Simple form	V-ing form
I can't longjump you can't longjump he can't longjump we can't longjump you can't longjump they can't longjump	I can't be longjumping you can't be longjumping he can't be longjumping we can't be longjumping you can't be longjumping they can't be longjumping
Perfect	V-ing perfect
I can't have longjumped you can't have longjumped he can't have longjumped we can't have longjumped you can't have longjumped they can't have longjumped	I can't have been longjumping you can't have been longjumping he can't have been longjumping we can't have been longjumping you can't have been longjumping they can't have been longjumping

Interrogative form

Simple form	V-ing form
can I longjump? can you longjump? can he longjump? can we longjump? can you longjump? can they longjump?	can I be longjumping? can you be longjumping? can he be longjumping? can we be longjumping? can you be longjumping? can they be longjumping?
Perfect	V-ing perfect
can I have longjumped? can you have longjumped? can he have longjumped? can we have longjumped? can you have longjumped? can they have longjumped?	can I have been longjumping? can you have been longjumping? can he have been longjumping? can we have been longjumping? can you have been longjumping? can they have been longjumping?

Interro-negative form

Simple form	V-ing form
can't I longjump? can't you longjump? can't he longjump? can't we longjump? can't you longjump? can't they longjump?	can't I be longjumping? can't you be longjumping? can't he be longjumping? can't we be longjumping? can't you be longjumping? can't they be longjumping?
Perfect	V-ing perfect
can't I have longjumped? can't you have longjumped? can't he have longjumped? can't we have longjumped? can't you have longjumped? can't they have longjumped?	can't I have been longjumping? can't you have been longjumping? can't he have been longjumping? can't we have been longjumping? can't you have been longjumping? can't they have been longjumping?