can burr
Regular verb: burr - burred- burred

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can burr
you can burr
he can burr
we can burr
you can burr
they can burr 	I can be burring
you can be burring
he can be burring
we can be burring
you can be burring
they can be burring	I can have burred
you can have burred
he can have burred
we can have burred
you can have burred
they can have burred	I can have been burring
you can have been burring
he can have been burring
we can have been burring
you can have been burring
they can have been burring	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't burr
you can't burr
he can't burr
we can't burr
you can't burr
they can't burr 	I can't be burring
you can't be burring
he can't be burring
we can't be burring
you can't be burring
they can't be burring	I can't have burred
you can't have burred
he can't have burred
we can't have burred
you can't have burred
they can't have burred	I can't have been burring
you can't have been burring
he can't have been burring
we can't have been burring
you can't have been burring
they can't have been burring	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I burr?
can you burr?
can he burr?
can we burr?
can you burr?
can they burr? 	can I be burring?
can you be burring?
can he be burring?
can we be burring?
can you be burring?
can they be burring? 	can I have burred?
can you have burred?
can he have burred?
can we have burred?
can you have burred?
can they have burred? 	can I have been burring?
can you have been burring?
can he have been burring?
can we have been burring?
can you have been burring?
can they have been burring? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I burr?
can't you burr?
can't he burr?
can't we burr?
can't you burr?
can't they burr? 	can't I be burring?
can't you be burring?
can't he be burring?
can't we be burring?
can't you be burring?
can't they be burring? 	can't I have burred?
can't you have burred?
can't he have burred?
can't we have burred?
can't you have burred?
can't they have burred? 	can't I have been burring?
can't you have been burring?
can't he have been burring?
can't we have been burring?
can't you have been burring?
can't they have been burring?