must perdure
Verbe régulier : perdure - perdured- perdured

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must perdure
you must perdure
she must perdure
we must perdure
you must perdure
they must perdure 	I must be perduring
you must be perduring
she must be perduring
we must be perduring
you must be perduring
they must be perduring	I must have perdured
you must have perdured
she must have perdured
we must have perdured
you must have perdured
they must have perdured	I must have been perduring
you must have been perduring
she must have been perduring
we must have been perduring
you must have been perduring
they must have been perduring	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't perdure
you mustn't perdure
she mustn't perdure
we mustn't perdure
you mustn't perdure
they mustn't perdure 	I mustn't be perduring
you mustn't be perduring
she mustn't be perduring
we mustn't be perduring
you mustn't be perduring
they mustn't be perduring	I mustn't have perdured
you mustn't have perdured
she mustn't have perdured
we mustn't have perdured
you mustn't have perdured
they mustn't have perdured	I mustn't have been perduring
you mustn't have been perduring
she mustn't have been perduring
we mustn't have been perduring
you mustn't have been perduring
they mustn't have been perduring	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I perdure?
must you perdure?
must she perdure?
must we perdure?
must you perdure?
must they perdure? 	must I be perduring?
must you be perduring?
must she be perduring?
must we be perduring?
must you be perduring?
must they be perduring? 	must I have perdured?
must you have perdured?
must she have perdured?
must we have perdured?
must you have perdured?
must they have perdured? 	must I have been perduring?
must you have been perduring?
must she have been perduring?
must we have been perduring?
must you have been perduring?
must they have been perduring? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I perdure?
mustn't you perdure?
mustn't she perdure?
mustn't we perdure?
mustn't you perdure?
mustn't they perdure? 	mustn't I be perduring?
mustn't you be perduring?
mustn't she be perduring?
mustn't we be perduring?
mustn't you be perduring?
mustn't they be perduring? 	mustn't I have perdured?
mustn't you have perdured?
mustn't she have perdured?
mustn't we have perdured?
mustn't you have perdured?
mustn't they have perdured? 	mustn't I have been perduring?
mustn't you have been perduring?
mustn't she have been perduring?
mustn't we have been perduring?
mustn't you have been perduring?
mustn't they have been perduring?