English verb conjugation
MUST FAFF

Regular verb: faff - faffed - faffed

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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
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
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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?