must tank
Verbo regular: tank - tanked- tanked

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must tank
you must tank
he must tank
we must tank
you must tank
they must tank 	I must be tanking
you must be tanking
he must be tanking
we must be tanking
you must be tanking
they must be tanking	I must have tanked
you must have tanked
he must have tanked
we must have tanked
you must have tanked
they must have tanked	I must have been tanking
you must have been tanking
he must have been tanking
we must have been tanking
you must have been tanking
they must have been tanking	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not tank
you must not tank
he must not tank
we must not tank
you must not tank
they must not tank 	I must not be tanking
you must not be tanking
he must not be tanking
we must not be tanking
you must not be tanking
they must not be tanking	I must not have tanked
you must not have tanked
he must not have tanked
we must not have tanked
you must not have tanked
they must not have tanked	I must not have been tanking
you must not have been tanking
he must not have been tanking
we must not have been tanking
you must not have been tanking
they must not have been tanking	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I tank?
must you tank?
must he tank?
must we tank?
must you tank?
must they tank? 	must I be tanking?
must you be tanking?
must he be tanking?
must we be tanking?
must you be tanking?
must they be tanking? 	must I have tanked?
must you have tanked?
must he have tanked?
must we have tanked?
must you have tanked?
must they have tanked? 	must I have been tanking?
must you have been tanking?
must he have been tanking?
must we have been tanking?
must you have been tanking?
must they have been tanking? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not tank?
must you not tank?
must he not tank?
must we not tank?
must you not tank?
must they not tank? 	must I not be tanking?
must you not be tanking?
must he not be tanking?
must we not be tanking?
must you not be tanking?
must they not be tanking? 	must I not have tanked?
must you not have tanked?
must he not have tanked?
must we not have tanked?
must you not have tanked?
must they not have tanked? 	must I not have been tanking?
must you not have been tanking?
must he not have been tanking?
must we not have been tanking?
must you not have been tanking?
must they not have been tanking?