must refill
Verbo regular: refill - refilled- refilled

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must refill
you must refill
he must refill
we must refill
you must refill
they must refill 	I must be refilling
you must be refilling
he must be refilling
we must be refilling
you must be refilling
they must be refilling	I must have refilled
you must have refilled
he must have refilled
we must have refilled
you must have refilled
they must have refilled	I must have been refilling
you must have been refilling
he must have been refilling
we must have been refilling
you must have been refilling
they must have been refilling	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not refill
you must not refill
he must not refill
we must not refill
you must not refill
they must not refill 	I must not be refilling
you must not be refilling
he must not be refilling
we must not be refilling
you must not be refilling
they must not be refilling	I must not have refilled
you must not have refilled
he must not have refilled
we must not have refilled
you must not have refilled
they must not have refilled	I must not have been refilling
you must not have been refilling
he must not have been refilling
we must not have been refilling
you must not have been refilling
they must not have been refilling	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I refill?
must you refill?
must he refill?
must we refill?
must you refill?
must they refill? 	must I be refilling?
must you be refilling?
must he be refilling?
must we be refilling?
must you be refilling?
must they be refilling? 	must I have refilled?
must you have refilled?
must he have refilled?
must we have refilled?
must you have refilled?
must they have refilled? 	must I have been refilling?
must you have been refilling?
must he have been refilling?
must we have been refilling?
must you have been refilling?
must they have been refilling? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not refill?
must you not refill?
must he not refill?
must we not refill?
must you not refill?
must they not refill? 	must I not be refilling?
must you not be refilling?
must he not be refilling?
must we not be refilling?
must you not be refilling?
must they not be refilling? 	must I not have refilled?
must you not have refilled?
must he not have refilled?
must we not have refilled?
must you not have refilled?
must they not have refilled? 	must I not have been refilling?
must you not have been refilling?
must he not have been refilling?
must we not have been refilling?
must you not have been refilling?
must they not have been refilling?