must cotton
Regular verb: cotton - cottoned- cottoned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must cotton
you must cotton
he must cotton
we must cotton
you must cotton
they must cotton 	I must be cottoning
you must be cottoning
he must be cottoning
we must be cottoning
you must be cottoning
they must be cottoning	I must have cottoned
you must have cottoned
he must have cottoned
we must have cottoned
you must have cottoned
they must have cottoned	I must have been cottoning
you must have been cottoning
he must have been cottoning
we must have been cottoning
you must have been cottoning
they must have been cottoning	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't cotton
you mustn't cotton
he mustn't cotton
we mustn't cotton
you mustn't cotton
they mustn't cotton 	I mustn't be cottoning
you mustn't be cottoning
he mustn't be cottoning
we mustn't be cottoning
you mustn't be cottoning
they mustn't be cottoning	I mustn't have cottoned
you mustn't have cottoned
he mustn't have cottoned
we mustn't have cottoned
you mustn't have cottoned
they mustn't have cottoned	I mustn't have been cottoning
you mustn't have been cottoning
he mustn't have been cottoning
we mustn't have been cottoning
you mustn't have been cottoning
they mustn't have been cottoning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I cotton?
must you cotton?
must he cotton?
must we cotton?
must you cotton?
must they cotton? 	must I be cottoning?
must you be cottoning?
must he be cottoning?
must we be cottoning?
must you be cottoning?
must they be cottoning? 	must I have cottoned?
must you have cottoned?
must he have cottoned?
must we have cottoned?
must you have cottoned?
must they have cottoned? 	must I have been cottoning?
must you have been cottoning?
must he have been cottoning?
must we have been cottoning?
must you have been cottoning?
must they have been cottoning? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I cotton?
mustn't you cotton?
mustn't he cotton?
mustn't we cotton?
mustn't you cotton?
mustn't they cotton? 	mustn't I be cottoning?
mustn't you be cottoning?
mustn't he be cottoning?
mustn't we be cottoning?
mustn't you be cottoning?
mustn't they be cottoning? 	mustn't I have cottoned?
mustn't you have cottoned?
mustn't he have cottoned?
mustn't we have cottoned?
mustn't you have cottoned?
mustn't they have cottoned? 	mustn't I have been cottoning?
mustn't you have been cottoning?
mustn't he have been cottoning?
mustn't we have been cottoning?
mustn't you have been cottoning?
mustn't they have been cottoning?