must tug
Verbo regular: tug - tugged- tugged

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must tug
you must tug
he must tug
we must tug
you must tug
they must tug 	I must be tugging
you must be tugging
he must be tugging
we must be tugging
you must be tugging
they must be tugging	I must have tugged
you must have tugged
he must have tugged
we must have tugged
you must have tugged
they must have tugged	I must have been tugging
you must have been tugging
he must have been tugging
we must have been tugging
you must have been tugging
they must have been tugging	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not tug
you must not tug
he must not tug
we must not tug
you must not tug
they must not tug 	I must not be tugging
you must not be tugging
he must not be tugging
we must not be tugging
you must not be tugging
they must not be tugging	I must not have tugged
you must not have tugged
he must not have tugged
we must not have tugged
you must not have tugged
they must not have tugged	I must not have been tugging
you must not have been tugging
he must not have been tugging
we must not have been tugging
you must not have been tugging
they must not have been tugging	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I tug?
must you tug?
must he tug?
must we tug?
must you tug?
must they tug? 	must I be tugging?
must you be tugging?
must he be tugging?
must we be tugging?
must you be tugging?
must they be tugging? 	must I have tugged?
must you have tugged?
must he have tugged?
must we have tugged?
must you have tugged?
must they have tugged? 	must I have been tugging?
must you have been tugging?
must he have been tugging?
must we have been tugging?
must you have been tugging?
must they have been tugging? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not tug?
must you not tug?
must he not tug?
must we not tug?
must you not tug?
must they not tug? 	must I not be tugging?
must you not be tugging?
must he not be tugging?
must we not be tugging?
must you not be tugging?
must they not be tugging? 	must I not have tugged?
must you not have tugged?
must he not have tugged?
must we not have tugged?
must you not have tugged?
must they not have tugged? 	must I not have been tugging?
must you not have been tugging?
must he not have been tugging?
must we not have been tugging?
must you not have been tugging?
must they not have been tugging?