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 cannot longjump you cannot longjump he cannot longjump we cannot longjump you cannot longjump they cannot longjump	I cannot be longjumping you cannot be longjumping he cannot be longjumping we cannot be longjumping you cannot be longjumping they cannot be longjumping
Perfect	V-ing perfect
I cannot have longjumped you cannot have longjumped he cannot have longjumped we cannot have longjumped you cannot have longjumped they cannot have longjumped	I cannot have been longjumping you cannot have been longjumping he cannot have been longjumping we cannot have been longjumping you cannot have been longjumping they cannot 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 I not longjump? can you not longjump? can he not longjump? can we not longjump? can you not longjump? can they not longjump?	can I not be longjumping? can you not be longjumping? can he not be longjumping? can we not be longjumping? can you not be longjumping? can they not be longjumping?
Perfect	V-ing perfect
can I not have longjumped? can you not have longjumped? can he not have longjumped? can we not have longjumped? can you not have longjumped? can they not have longjumped?	can I not have been longjumping? can you not have been longjumping? can he not have been longjumping? can we not have been longjumping? can you not have been longjumping? can they not have been longjumping?