must skirl
Verbe régulier : skirl - skirled- skirled

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must skirl
you must skirl
he must skirl
we must skirl
you must skirl
they must skirl 	I must be skirling
you must be skirling
he must be skirling
we must be skirling
you must be skirling
they must be skirling	I must have skirled
you must have skirled
he must have skirled
we must have skirled
you must have skirled
they must have skirled	I must have been skirling
you must have been skirling
he must have been skirling
we must have been skirling
you must have been skirling
they must have been skirling	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't skirl
you mustn't skirl
he mustn't skirl
we mustn't skirl
you mustn't skirl
they mustn't skirl 	I mustn't be skirling
you mustn't be skirling
he mustn't be skirling
we mustn't be skirling
you mustn't be skirling
they mustn't be skirling	I mustn't have skirled
you mustn't have skirled
he mustn't have skirled
we mustn't have skirled
you mustn't have skirled
they mustn't have skirled	I mustn't have been skirling
you mustn't have been skirling
he mustn't have been skirling
we mustn't have been skirling
you mustn't have been skirling
they mustn't have been skirling	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I skirl?
must you skirl?
must he skirl?
must we skirl?
must you skirl?
must they skirl? 	must I be skirling?
must you be skirling?
must he be skirling?
must we be skirling?
must you be skirling?
must they be skirling? 	must I have skirled?
must you have skirled?
must he have skirled?
must we have skirled?
must you have skirled?
must they have skirled? 	must I have been skirling?
must you have been skirling?
must he have been skirling?
must we have been skirling?
must you have been skirling?
must they have been skirling? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I skirl?
mustn't you skirl?
mustn't he skirl?
mustn't we skirl?
mustn't you skirl?
mustn't they skirl? 	mustn't I be skirling?
mustn't you be skirling?
mustn't he be skirling?
mustn't we be skirling?
mustn't you be skirling?
mustn't they be skirling? 	mustn't I have skirled?
mustn't you have skirled?
mustn't he have skirled?
mustn't we have skirled?
mustn't you have skirled?
mustn't they have skirled? 	mustn't I have been skirling?
mustn't you have been skirling?
mustn't he have been skirling?
mustn't we have been skirling?
mustn't you have been skirling?
mustn't they have been skirling?