must submarine
Verbo regular: submarine - submarined- submarined

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must submarine
you must submarine
he must submarine
we must submarine
you must submarine
they must submarine 	I must be submarining
you must be submarining
he must be submarining
we must be submarining
you must be submarining
they must be submarining	I must have submarined
you must have submarined
he must have submarined
we must have submarined
you must have submarined
they must have submarined	I must have been submarining
you must have been submarining
he must have been submarining
we must have been submarining
you must have been submarining
they must have been submarining	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not submarine
you must not submarine
he must not submarine
we must not submarine
you must not submarine
they must not submarine 	I must not be submarining
you must not be submarining
he must not be submarining
we must not be submarining
you must not be submarining
they must not be submarining	I must not have submarined
you must not have submarined
he must not have submarined
we must not have submarined
you must not have submarined
they must not have submarined	I must not have been submarining
you must not have been submarining
he must not have been submarining
we must not have been submarining
you must not have been submarining
they must not have been submarining	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I submarine?
must you submarine?
must he submarine?
must we submarine?
must you submarine?
must they submarine? 	must I be submarining?
must you be submarining?
must he be submarining?
must we be submarining?
must you be submarining?
must they be submarining? 	must I have submarined?
must you have submarined?
must he have submarined?
must we have submarined?
must you have submarined?
must they have submarined? 	must I have been submarining?
must you have been submarining?
must he have been submarining?
must we have been submarining?
must you have been submarining?
must they have been submarining? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not submarine?
must you not submarine?
must he not submarine?
must we not submarine?
must you not submarine?
must they not submarine? 	must I not be submarining?
must you not be submarining?
must he not be submarining?
must we not be submarining?
must you not be submarining?
must they not be submarining? 	must I not have submarined?
must you not have submarined?
must he not have submarined?
must we not have submarined?
must you not have submarined?
must they not have submarined? 	must I not have been submarining?
must you not have been submarining?
must he not have been submarining?
must we not have been submarining?
must you not have been submarining?
must they not have been submarining?