must chug
Verbo regular: chug - chugged- chugged

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must chug
you must chug
he must chug
we must chug
you must chug
they must chug 	I must be chugging
you must be chugging
he must be chugging
we must be chugging
you must be chugging
they must be chugging	I must have chugged
you must have chugged
he must have chugged
we must have chugged
you must have chugged
they must have chugged	I must have been chugging
you must have been chugging
he must have been chugging
we must have been chugging
you must have been chugging
they must have been chugging	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mustn't chug
you mustn't chug
he mustn't chug
we mustn't chug
you mustn't chug
they mustn't chug 	I mustn't be chugging
you mustn't be chugging
he mustn't be chugging
we mustn't be chugging
you mustn't be chugging
they mustn't be chugging	I mustn't have chugged
you mustn't have chugged
he mustn't have chugged
we mustn't have chugged
you mustn't have chugged
they mustn't have chugged	I mustn't have been chugging
you mustn't have been chugging
he mustn't have been chugging
we mustn't have been chugging
you mustn't have been chugging
they mustn't have been chugging	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I chug?
must you chug?
must he chug?
must we chug?
must you chug?
must they chug? 	must I be chugging?
must you be chugging?
must he be chugging?
must we be chugging?
must you be chugging?
must they be chugging? 	must I have chugged?
must you have chugged?
must he have chugged?
must we have chugged?
must you have chugged?
must they have chugged? 	must I have been chugging?
must you have been chugging?
must he have been chugging?
must we have been chugging?
must you have been chugging?
must they have been chugging? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mustn't I chug?
mustn't you chug?
mustn't he chug?
mustn't we chug?
mustn't you chug?
mustn't they chug? 	mustn't I be chugging?
mustn't you be chugging?
mustn't he be chugging?
mustn't we be chugging?
mustn't you be chugging?
mustn't they be chugging? 	mustn't I have chugged?
mustn't you have chugged?
mustn't he have chugged?
mustn't we have chugged?
mustn't you have chugged?
mustn't they have chugged? 	mustn't I have been chugging?
mustn't you have been chugging?
mustn't he have been chugging?
mustn't we have been chugging?
mustn't you have been chugging?
mustn't they have been chugging?