can bump
Regular verb: bump - bumped- bumped

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
I can't bump
you can't bump
she can't bump
we can't bump
you can't bump
they can't bump 	I can't be bumping
you can't be bumping
she can't be bumping
we can't be bumping
you can't be bumping
they can't be bumping	I can't have bumped
you can't have bumped
she can't have bumped
we can't have bumped
you can't have bumped
they can't have bumped	I can't have been bumping
you can't have been bumping
she can't have been bumping
we can't have been bumping
you can't have been bumping
they can't have been bumping	

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