can stiff
Verbe régulier : stiff - stiffed- stiffed

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I can stiff
you can stiff
she can stiff
we can stiff
you can stiff
they can stiff 	I can be stiffing
you can be stiffing
she can be stiffing
we can be stiffing
you can be stiffing
they can be stiffing	I can have stiffed
you can have stiffed
she can have stiffed
we can have stiffed
you can have stiffed
they can have stiffed	I can have been stiffing
you can have been stiffing
she can have been stiffing
we can have been stiffing
you can have been stiffing
they can have been stiffing	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I can't stiff
you can't stiff
she can't stiff
we can't stiff
you can't stiff
they can't stiff 	I can't be stiffing
you can't be stiffing
she can't be stiffing
we can't be stiffing
you can't be stiffing
they can't be stiffing	I can't have stiffed
you can't have stiffed
she can't have stiffed
we can't have stiffed
you can't have stiffed
they can't have stiffed	I can't have been stiffing
you can't have been stiffing
she can't have been stiffing
we can't have been stiffing
you can't have been stiffing
they can't have been stiffing	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
can I stiff?
can you stiff?
can she stiff?
can we stiff?
can you stiff?
can they stiff? 	can I be stiffing?
can you be stiffing?
can she be stiffing?
can we be stiffing?
can you be stiffing?
can they be stiffing? 	can I have stiffed?
can you have stiffed?
can she have stiffed?
can we have stiffed?
can you have stiffed?
can they have stiffed? 	can I have been stiffing?
can you have been stiffing?
can she have been stiffing?
can we have been stiffing?
can you have been stiffing?
can they have been stiffing? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
can't I stiff?
can't you stiff?
can't she stiff?
can't we stiff?
can't you stiff?
can't they stiff? 	can't I be stiffing?
can't you be stiffing?
can't she be stiffing?
can't we be stiffing?
can't you be stiffing?
can't they be stiffing? 	can't I have stiffed?
can't you have stiffed?
can't she have stiffed?
can't we have stiffed?
can't you have stiffed?
can't they have stiffed? 	can't I have been stiffing?
can't you have been stiffing?
can't she have been stiffing?
can't we have been stiffing?
can't you have been stiffing?
can't they have been stiffing?