English verb conjugation
MUST SCARF

Regular verb: scarf - scarfed - scarfed

Affirmation

Simple form	V-ing form
I must scarf you must scarf he must scarf we must scarf you must scarf they must scarf	I must be scarfing you must be scarfing he must be scarfing we must be scarfing you must be scarfing they must be scarfing
Perfect	V-ing perfect
I must have scarfed you must have scarfed he must have scarfed we must have scarfed you must have scarfed they must have scarfed	I must have been scarfing you must have been scarfing he must have been scarfing we must have been scarfing you must have been scarfing they must have been scarfing

Negation

Simple form	V-ing form
I must not scarf you must not scarf he must not scarf we must not scarf you must not scarf they must not scarf	I must not be scarfing you must not be scarfing he must not be scarfing we must not be scarfing you must not be scarfing they must not be scarfing
Perfect	V-ing perfect
I must not have scarfed you must not have scarfed he must not have scarfed we must not have scarfed you must not have scarfed they must not have scarfed	I must not have been scarfing you must not have been scarfing he must not have been scarfing we must not have been scarfing you must not have been scarfing they must not have been scarfing

Interrogative form

Simple form	V-ing form
must I scarf? must you scarf? must he scarf? must we scarf? must you scarf? must they scarf?	must I be scarfing? must you be scarfing? must he be scarfing? must we be scarfing? must you be scarfing? must they be scarfing?
Perfect	V-ing perfect
must I have scarfed? must you have scarfed? must he have scarfed? must we have scarfed? must you have scarfed? must they have scarfed?	must I have been scarfing? must you have been scarfing? must he have been scarfing? must we have been scarfing? must you have been scarfing? must they have been scarfing?

Interro-negative form

Simple form	V-ing form
must I not scarf? must you not scarf? must he not scarf? must we not scarf? must you not scarf? must they not scarf?	must I not be scarfing? must you not be scarfing? must he not be scarfing? must we not be scarfing? must you not be scarfing? must they not be scarfing?
Perfect	V-ing perfect
must I not have scarfed? must you not have scarfed? must he not have scarfed? must we not have scarfed? must you not have scarfed? must they not have scarfed?	must I not have been scarfing? must you not have been scarfing? must he not have been scarfing? must we not have been scarfing? must you not have been scarfing? must they not have been scarfing?