must smoke
Regular verb: smoke - smoked- smoked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must smoke
you must smoke
he must smoke
we must smoke
you must smoke
they must smoke 	I must be smoking
you must be smoking
he must be smoking
we must be smoking
you must be smoking
they must be smoking	I must have smoked
you must have smoked
he must have smoked
we must have smoked
you must have smoked
they must have smoked	I must have been smoking
you must have been smoking
he must have been smoking
we must have been smoking
you must have been smoking
they must have been smoking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't smoke
you mustn't smoke
he mustn't smoke
we mustn't smoke
you mustn't smoke
they mustn't smoke 	I mustn't be smoking
you mustn't be smoking
he mustn't be smoking
we mustn't be smoking
you mustn't be smoking
they mustn't be smoking	I mustn't have smoked
you mustn't have smoked
he mustn't have smoked
we mustn't have smoked
you mustn't have smoked
they mustn't have smoked	I mustn't have been smoking
you mustn't have been smoking
he mustn't have been smoking
we mustn't have been smoking
you mustn't have been smoking
they mustn't have been smoking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I smoke?
must you smoke?
must he smoke?
must we smoke?
must you smoke?
must they smoke? 	must I be smoking?
must you be smoking?
must he be smoking?
must we be smoking?
must you be smoking?
must they be smoking? 	must I have smoked?
must you have smoked?
must he have smoked?
must we have smoked?
must you have smoked?
must they have smoked? 	must I have been smoking?
must you have been smoking?
must he have been smoking?
must we have been smoking?
must you have been smoking?
must they have been smoking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I smoke?
mustn't you smoke?
mustn't he smoke?
mustn't we smoke?
mustn't you smoke?
mustn't they smoke? 	mustn't I be smoking?
mustn't you be smoking?
mustn't he be smoking?
mustn't we be smoking?
mustn't you be smoking?
mustn't they be smoking? 	mustn't I have smoked?
mustn't you have smoked?
mustn't he have smoked?
mustn't we have smoked?
mustn't you have smoked?
mustn't they have smoked? 	mustn't I have been smoking?
mustn't you have been smoking?
mustn't he have been smoking?
mustn't we have been smoking?
mustn't you have been smoking?
mustn't they have been smoking?