must gaff
Verbo regular: gaff - gaffed- gaffed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must gaff
you must gaff
he must gaff
we must gaff
you must gaff
they must gaff 	I must be gaffing
you must be gaffing
he must be gaffing
we must be gaffing
you must be gaffing
they must be gaffing	I must have gaffed
you must have gaffed
he must have gaffed
we must have gaffed
you must have gaffed
they must have gaffed	I must have been gaffing
you must have been gaffing
he must have been gaffing
we must have been gaffing
you must have been gaffing
they must have been gaffing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not gaff
you must not gaff
he must not gaff
we must not gaff
you must not gaff
they must not gaff 	I must not be gaffing
you must not be gaffing
he must not be gaffing
we must not be gaffing
you must not be gaffing
they must not be gaffing	I must not have gaffed
you must not have gaffed
he must not have gaffed
we must not have gaffed
you must not have gaffed
they must not have gaffed	I must not have been gaffing
you must not have been gaffing
he must not have been gaffing
we must not have been gaffing
you must not have been gaffing
they must not have been gaffing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I gaff?
must you gaff?
must he gaff?
must we gaff?
must you gaff?
must they gaff? 	must I be gaffing?
must you be gaffing?
must he be gaffing?
must we be gaffing?
must you be gaffing?
must they be gaffing? 	must I have gaffed?
must you have gaffed?
must he have gaffed?
must we have gaffed?
must you have gaffed?
must they have gaffed? 	must I have been gaffing?
must you have been gaffing?
must he have been gaffing?
must we have been gaffing?
must you have been gaffing?
must they have been gaffing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not gaff?
must you not gaff?
must he not gaff?
must we not gaff?
must you not gaff?
must they not gaff? 	must I not be gaffing?
must you not be gaffing?
must he not be gaffing?
must we not be gaffing?
must you not be gaffing?
must they not be gaffing? 	must I not have gaffed?
must you not have gaffed?
must he not have gaffed?
must we not have gaffed?
must you not have gaffed?
must they not have gaffed? 	must I not have been gaffing?
must you not have been gaffing?
must he not have been gaffing?
must we not have been gaffing?
must you not have been gaffing?
must they not have been gaffing?