could perfuse
Verbe régulier : perfuse - perfused- perfused

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could perfuse
you could perfuse
he could perfuse
we could perfuse
you could perfuse
they could perfuse 	I could be perfusing
you could be perfusing
he could be perfusing
we could be perfusing
you could be perfusing
they could be perfusing	I could have perfused
you could have perfused
he could have perfused
we could have perfused
you could have perfused
they could have perfused	I could have been perfusing
you could have been perfusing
he could have been perfusing
we could have been perfusing
you could have been perfusing
they could have been perfusing	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I couldn't perfuse
you couldn't perfuse
he couldn't perfuse
we couldn't perfuse
you couldn't perfuse
they couldn't perfuse 	I couldn't be perfusing
you couldn't be perfusing
he couldn't be perfusing
we couldn't be perfusing
you couldn't be perfusing
they couldn't be perfusing	I couldn't have perfused
you couldn't have perfused
he couldn't have perfused
we couldn't have perfused
you couldn't have perfused
they couldn't have perfused	I couldn't have been perfusing
you couldn't have been perfusing
he couldn't have been perfusing
we couldn't have been perfusing
you couldn't have been perfusing
they couldn't have been perfusing	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I perfuse?
could you perfuse?
could he perfuse?
could we perfuse?
could you perfuse?
could they perfuse? 	could I be perfusing?
could you be perfusing?
could he be perfusing?
could we be perfusing?
could you be perfusing?
could they be perfusing? 	could I have perfused?
could you have perfused?
could he have perfused?
could we have perfused?
could you have perfused?
could they have perfused? 	could I have been perfusing?
could you have been perfusing?
could he have been perfusing?
could we have been perfusing?
could you have been perfusing?
could they have been perfusing? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
couldn't I perfuse?
couldn't you perfuse?
couldn't he perfuse?
couldn't we perfuse?
couldn't you perfuse?
couldn't they perfuse? 	couldn't I be perfusing?
couldn't you be perfusing?
couldn't he be perfusing?
couldn't we be perfusing?
couldn't you be perfusing?
couldn't they be perfusing? 	couldn't I have perfused?
couldn't you have perfused?
couldn't he have perfused?
couldn't we have perfused?
couldn't you have perfused?
couldn't they have perfused? 	couldn't I have been perfusing?
couldn't you have been perfusing?
couldn't he have been perfusing?
couldn't we have been perfusing?
couldn't you have been perfusing?
couldn't they have been perfusing?