can stump
Regular verb: stump - stumped- stumped

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can stump
you can stump
she can stump
we can stump
you can stump
they can stump 	I can be stumping
you can be stumping
she can be stumping
we can be stumping
you can be stumping
they can be stumping	I can have stumped
you can have stumped
she can have stumped
we can have stumped
you can have stumped
they can have stumped	I can have been stumping
you can have been stumping
she can have been stumping
we can have been stumping
you can have been stumping
they can have been stumping	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't stump
you can't stump
she can't stump
we can't stump
you can't stump
they can't stump 	I can't be stumping
you can't be stumping
she can't be stumping
we can't be stumping
you can't be stumping
they can't be stumping	I can't have stumped
you can't have stumped
she can't have stumped
we can't have stumped
you can't have stumped
they can't have stumped	I can't have been stumping
you can't have been stumping
she can't have been stumping
we can't have been stumping
you can't have been stumping
they can't have been stumping	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I stump?
can you stump?
can she stump?
can we stump?
can you stump?
can they stump? 	can I be stumping?
can you be stumping?
can she be stumping?
can we be stumping?
can you be stumping?
can they be stumping? 	can I have stumped?
can you have stumped?
can she have stumped?
can we have stumped?
can you have stumped?
can they have stumped? 	can I have been stumping?
can you have been stumping?
can she have been stumping?
can we have been stumping?
can you have been stumping?
can they have been stumping? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I stump?
can't you stump?
can't she stump?
can't we stump?
can't you stump?
can't they stump? 	can't I be stumping?
can't you be stumping?
can't she be stumping?
can't we be stumping?
can't you be stumping?
can't they be stumping? 	can't I have stumped?
can't you have stumped?
can't she have stumped?
can't we have stumped?
can't you have stumped?
can't they have stumped? 	can't I have been stumping?
can't you have been stumping?
can't she have been stumping?
can't we have been stumping?
can't you have been stumping?
can't they have been stumping?