must huff
Verbo regular: huff - huffed- huffed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must huff
you must huff
he must huff
we must huff
you must huff
they must huff 	I must be huffing
you must be huffing
he must be huffing
we must be huffing
you must be huffing
they must be huffing	I must have huffed
you must have huffed
he must have huffed
we must have huffed
you must have huffed
they must have huffed	I must have been huffing
you must have been huffing
he must have been huffing
we must have been huffing
you must have been huffing
they must have been huffing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not huff
you must not huff
he must not huff
we must not huff
you must not huff
they must not huff 	I must not be huffing
you must not be huffing
he must not be huffing
we must not be huffing
you must not be huffing
they must not be huffing	I must not have huffed
you must not have huffed
he must not have huffed
we must not have huffed
you must not have huffed
they must not have huffed	I must not have been huffing
you must not have been huffing
he must not have been huffing
we must not have been huffing
you must not have been huffing
they must not have been huffing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I huff?
must you huff?
must he huff?
must we huff?
must you huff?
must they huff? 	must I be huffing?
must you be huffing?
must he be huffing?
must we be huffing?
must you be huffing?
must they be huffing? 	must I have huffed?
must you have huffed?
must he have huffed?
must we have huffed?
must you have huffed?
must they have huffed? 	must I have been huffing?
must you have been huffing?
must he have been huffing?
must we have been huffing?
must you have been huffing?
must they have been huffing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not huff?
must you not huff?
must he not huff?
must we not huff?
must you not huff?
must they not huff? 	must I not be huffing?
must you not be huffing?
must he not be huffing?
must we not be huffing?
must you not be huffing?
must they not be huffing? 	must I not have huffed?
must you not have huffed?
must he not have huffed?
must we not have huffed?
must you not have huffed?
must they not have huffed? 	must I not have been huffing?
must you not have been huffing?
must he not have been huffing?
must we not have been huffing?
must you not have been huffing?
must they not have been huffing?