must curse
Regular verb: curse - cursed- cursed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must curse
you must curse
she must curse
we must curse
you must curse
they must curse 	I must be cursing
you must be cursing
she must be cursing
we must be cursing
you must be cursing
they must be cursing	I must have cursed
you must have cursed
she must have cursed
we must have cursed
you must have cursed
they must have cursed	I must have been cursing
you must have been cursing
she must have been cursing
we must have been cursing
you must have been cursing
they must have been cursing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't curse
you mustn't curse
she mustn't curse
we mustn't curse
you mustn't curse
they mustn't curse 	I mustn't be cursing
you mustn't be cursing
she mustn't be cursing
we mustn't be cursing
you mustn't be cursing
they mustn't be cursing	I mustn't have cursed
you mustn't have cursed
she mustn't have cursed
we mustn't have cursed
you mustn't have cursed
they mustn't have cursed	I mustn't have been cursing
you mustn't have been cursing
she mustn't have been cursing
we mustn't have been cursing
you mustn't have been cursing
they mustn't have been cursing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I curse?
must you curse?
must she curse?
must we curse?
must you curse?
must they curse? 	must I be cursing?
must you be cursing?
must she be cursing?
must we be cursing?
must you be cursing?
must they be cursing? 	must I have cursed?
must you have cursed?
must she have cursed?
must we have cursed?
must you have cursed?
must they have cursed? 	must I have been cursing?
must you have been cursing?
must she have been cursing?
must we have been cursing?
must you have been cursing?
must they have been cursing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I curse?
mustn't you curse?
mustn't she curse?
mustn't we curse?
mustn't you curse?
mustn't they curse? 	mustn't I be cursing?
mustn't you be cursing?
mustn't she be cursing?
mustn't we be cursing?
mustn't you be cursing?
mustn't they be cursing? 	mustn't I have cursed?
mustn't you have cursed?
mustn't she have cursed?
mustn't we have cursed?
mustn't you have cursed?
mustn't they have cursed? 	mustn't I have been cursing?
mustn't you have been cursing?
mustn't she have been cursing?
mustn't we have been cursing?
mustn't you have been cursing?
mustn't they have been cursing?