must twill
Regular verb: twill - twilled- twilled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must twill
you must twill
he must twill
we must twill
you must twill
they must twill 	I must be twilling
you must be twilling
he must be twilling
we must be twilling
you must be twilling
they must be twilling	I must have twilled
you must have twilled
he must have twilled
we must have twilled
you must have twilled
they must have twilled	I must have been twilling
you must have been twilling
he must have been twilling
we must have been twilling
you must have been twilling
they must have been twilling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't twill
you mustn't twill
he mustn't twill
we mustn't twill
you mustn't twill
they mustn't twill 	I mustn't be twilling
you mustn't be twilling
he mustn't be twilling
we mustn't be twilling
you mustn't be twilling
they mustn't be twilling	I mustn't have twilled
you mustn't have twilled
he mustn't have twilled
we mustn't have twilled
you mustn't have twilled
they mustn't have twilled	I mustn't have been twilling
you mustn't have been twilling
he mustn't have been twilling
we mustn't have been twilling
you mustn't have been twilling
they mustn't have been twilling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I twill?
must you twill?
must he twill?
must we twill?
must you twill?
must they twill? 	must I be twilling?
must you be twilling?
must he be twilling?
must we be twilling?
must you be twilling?
must they be twilling? 	must I have twilled?
must you have twilled?
must he have twilled?
must we have twilled?
must you have twilled?
must they have twilled? 	must I have been twilling?
must you have been twilling?
must he have been twilling?
must we have been twilling?
must you have been twilling?
must they have been twilling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I twill?
mustn't you twill?
mustn't he twill?
mustn't we twill?
mustn't you twill?
mustn't they twill? 	mustn't I be twilling?
mustn't you be twilling?
mustn't he be twilling?
mustn't we be twilling?
mustn't you be twilling?
mustn't they be twilling? 	mustn't I have twilled?
mustn't you have twilled?
mustn't he have twilled?
mustn't we have twilled?
mustn't you have twilled?
mustn't they have twilled? 	mustn't I have been twilling?
mustn't you have been twilling?
mustn't he have been twilling?
mustn't we have been twilling?
mustn't you have been twilling?
mustn't they have been twilling?