must perfuse
Verbe régulier : perfuse - perfused- perfused

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

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

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

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