must faff
Regular verb: faff - faffed- faffed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must faff
you must faff
he must faff
we must faff
you must faff
they must faff 	I must be faffing
you must be faffing
he must be faffing
we must be faffing
you must be faffing
they must be faffing	I must have faffed
you must have faffed
he must have faffed
we must have faffed
you must have faffed
they must have faffed	I must have been faffing
you must have been faffing
he must have been faffing
we must have been faffing
you must have been faffing
they must have been faffing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not faff
you must not faff
he must not faff
we must not faff
you must not faff
they must not faff 	I must not be faffing
you must not be faffing
he must not be faffing
we must not be faffing
you must not be faffing
they must not be faffing	I must not have faffed
you must not have faffed
he must not have faffed
we must not have faffed
you must not have faffed
they must not have faffed	I must not have been faffing
you must not have been faffing
he must not have been faffing
we must not have been faffing
you must not have been faffing
they must not have been faffing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I faff?
must you faff?
must he faff?
must we faff?
must you faff?
must they faff? 	must I be faffing?
must you be faffing?
must he be faffing?
must we be faffing?
must you be faffing?
must they be faffing? 	must I have faffed?
must you have faffed?
must he have faffed?
must we have faffed?
must you have faffed?
must they have faffed? 	must I have been faffing?
must you have been faffing?
must he have been faffing?
must we have been faffing?
must you have been faffing?
must they have been faffing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not faff?
must you not faff?
must he not faff?
must we not faff?
must you not faff?
must they not faff? 	must I not be faffing?
must you not be faffing?
must he not be faffing?
must we not be faffing?
must you not be faffing?
must they not be faffing? 	must I not have faffed?
must you not have faffed?
must he not have faffed?
must we not have faffed?
must you not have faffed?
must they not have faffed? 	must I not have been faffing?
must you not have been faffing?
must he not have been faffing?
must we not have been faffing?
must you not have been faffing?
must they not have been faffing?