English verb conjugation
CAN BUMP

Regular verb: bump - bumped - bumped

Affirmation

Simple form	V-ing form
I can bump you can bump she can bump we can bump you can bump they can bump	I can be bumping you can be bumping she can be bumping we can be bumping you can be bumping they can be bumping
Perfect	V-ing perfect
I can have bumped you can have bumped she can have bumped we can have bumped you can have bumped they can have bumped	I can have been bumping you can have been bumping she can have been bumping we can have been bumping you can have been bumping they can have been bumping

Negation

Simple form	V-ing form
I cannot bump you cannot bump she cannot bump we cannot bump you cannot bump they cannot bump	I cannot be bumping you cannot be bumping she cannot be bumping we cannot be bumping you cannot be bumping they cannot be bumping
Perfect	V-ing perfect
I cannot have bumped you cannot have bumped she cannot have bumped we cannot have bumped you cannot have bumped they cannot have bumped	I cannot have been bumping you cannot have been bumping she cannot have been bumping we cannot have been bumping you cannot have been bumping they cannot have been bumping

Interrogative form

Simple form	V-ing form
can I bump? can you bump? can she bump? can we bump? can you bump? can they bump?	can I be bumping? can you be bumping? can she be bumping? can we be bumping? can you be bumping? can they be bumping?
Perfect	V-ing perfect
can I have bumped? can you have bumped? can she have bumped? can we have bumped? can you have bumped? can they have bumped?	can I have been bumping? can you have been bumping? can she have been bumping? can we have been bumping? can you have been bumping? can they have been bumping?

Interro-negative form

Simple form	V-ing form
can I not bump? can you not bump? can she not bump? can we not bump? can you not bump? can they not bump?	can I not be bumping? can you not be bumping? can she not be bumping? can we not be bumping? can you not be bumping? can they not be bumping?
Perfect	V-ing perfect
can I not have bumped? can you not have bumped? can she not have bumped? can we not have bumped? can you not have bumped? can they not have bumped?	can I not have been bumping? can you not have been bumping? can she not have been bumping? can we not have been bumping? can you not have been bumping? can they not have been bumping?