must rough
Regular verb: rough - roughed- roughed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must rough
you must rough
she must rough
we must rough
you must rough
they must rough 	I must be roughing
you must be roughing
she must be roughing
we must be roughing
you must be roughing
they must be roughing	I must have roughed
you must have roughed
she must have roughed
we must have roughed
you must have roughed
they must have roughed	I must have been roughing
you must have been roughing
she must have been roughing
we must have been roughing
you must have been roughing
they must have been roughing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't rough
you mustn't rough
she mustn't rough
we mustn't rough
you mustn't rough
they mustn't rough 	I mustn't be roughing
you mustn't be roughing
she mustn't be roughing
we mustn't be roughing
you mustn't be roughing
they mustn't be roughing	I mustn't have roughed
you mustn't have roughed
she mustn't have roughed
we mustn't have roughed
you mustn't have roughed
they mustn't have roughed	I mustn't have been roughing
you mustn't have been roughing
she mustn't have been roughing
we mustn't have been roughing
you mustn't have been roughing
they mustn't have been roughing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I rough?
must you rough?
must she rough?
must we rough?
must you rough?
must they rough? 	must I be roughing?
must you be roughing?
must she be roughing?
must we be roughing?
must you be roughing?
must they be roughing? 	must I have roughed?
must you have roughed?
must she have roughed?
must we have roughed?
must you have roughed?
must they have roughed? 	must I have been roughing?
must you have been roughing?
must she have been roughing?
must we have been roughing?
must you have been roughing?
must they have been roughing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I rough?
mustn't you rough?
mustn't she rough?
mustn't we rough?
mustn't you rough?
mustn't they rough? 	mustn't I be roughing?
mustn't you be roughing?
mustn't she be roughing?
mustn't we be roughing?
mustn't you be roughing?
mustn't they be roughing? 	mustn't I have roughed?
mustn't you have roughed?
mustn't she have roughed?
mustn't we have roughed?
mustn't you have roughed?
mustn't they have roughed? 	mustn't I have been roughing?
mustn't you have been roughing?
mustn't she have been roughing?
mustn't we have been roughing?
mustn't you have been roughing?
mustn't they have been roughing?