can bump
Regular verb: bump - bumped- bumped

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