can fur
Verbo regular: fur - furred- furred

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I can fur
you can fur
he can fur
we can fur
you can fur
they can fur 	I can be furring
you can be furring
he can be furring
we can be furring
you can be furring
they can be furring	I can have furred
you can have furred
he can have furred
we can have furred
you can have furred
they can have furred	I can have been furring
you can have been furring
he can have been furring
we can have been furring
you can have been furring
they can have been furring	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I cannot fur
you cannot fur
he cannot fur
we cannot fur
you cannot fur
they cannot fur 	I cannot be furring
you cannot be furring
he cannot be furring
we cannot be furring
you cannot be furring
they cannot be furring	I cannot have furred
you cannot have furred
he cannot have furred
we cannot have furred
you cannot have furred
they cannot have furred	I cannot have been furring
you cannot have been furring
he cannot have been furring
we cannot have been furring
you cannot have been furring
they cannot have been furring	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I fur?
can you fur?
can he fur?
can we fur?
can you fur?
can they fur? 	can I be furring?
can you be furring?
can he be furring?
can we be furring?
can you be furring?
can they be furring? 	can I have furred?
can you have furred?
can he have furred?
can we have furred?
can you have furred?
can they have furred? 	can I have been furring?
can you have been furring?
can he have been furring?
can we have been furring?
can you have been furring?
can they have been furring? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I not fur?
can you not fur?
can he not fur?
can we not fur?
can you not fur?
can they not fur? 	can I not be furring?
can you not be furring?
can he not be furring?
can we not be furring?
can you not be furring?
can they not be furring? 	can I not have furred?
can you not have furred?
can he not have furred?
can we not have furred?
can you not have furred?
can they not have furred? 	can I not have been furring?
can you not have been furring?
can he not have been furring?
can we not have been furring?
can you not have been furring?
can they not have been furring?