must quirt
Verbe régulier : quirt - quirted- quirted

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must quirt
you must quirt
he must quirt
we must quirt
you must quirt
they must quirt 	I must be quirting
you must be quirting
he must be quirting
we must be quirting
you must be quirting
they must be quirting	I must have quirted
you must have quirted
he must have quirted
we must have quirted
you must have quirted
they must have quirted	I must have been quirting
you must have been quirting
he must have been quirting
we must have been quirting
you must have been quirting
they must have been quirting	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't quirt
you mustn't quirt
he mustn't quirt
we mustn't quirt
you mustn't quirt
they mustn't quirt 	I mustn't be quirting
you mustn't be quirting
he mustn't be quirting
we mustn't be quirting
you mustn't be quirting
they mustn't be quirting	I mustn't have quirted
you mustn't have quirted
he mustn't have quirted
we mustn't have quirted
you mustn't have quirted
they mustn't have quirted	I mustn't have been quirting
you mustn't have been quirting
he mustn't have been quirting
we mustn't have been quirting
you mustn't have been quirting
they mustn't have been quirting	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I quirt?
must you quirt?
must he quirt?
must we quirt?
must you quirt?
must they quirt? 	must I be quirting?
must you be quirting?
must he be quirting?
must we be quirting?
must you be quirting?
must they be quirting? 	must I have quirted?
must you have quirted?
must he have quirted?
must we have quirted?
must you have quirted?
must they have quirted? 	must I have been quirting?
must you have been quirting?
must he have been quirting?
must we have been quirting?
must you have been quirting?
must they have been quirting? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I quirt?
mustn't you quirt?
mustn't he quirt?
mustn't we quirt?
mustn't you quirt?
mustn't they quirt? 	mustn't I be quirting?
mustn't you be quirting?
mustn't he be quirting?
mustn't we be quirting?
mustn't you be quirting?
mustn't they be quirting? 	mustn't I have quirted?
mustn't you have quirted?
mustn't he have quirted?
mustn't we have quirted?
mustn't you have quirted?
mustn't they have quirted? 	mustn't I have been quirting?
mustn't you have been quirting?
mustn't he have been quirting?
mustn't we have been quirting?
mustn't you have been quirting?
mustn't they have been quirting?