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 mustn't scarf you mustn't scarf he mustn't scarf we mustn't scarf you mustn't scarf they mustn't scarf	I mustn't be scarfing you mustn't be scarfing he mustn't be scarfing we mustn't be scarfing you mustn't be scarfing they mustn't be scarfing
Perfect	V-ing perfect
I mustn't have scarfed you mustn't have scarfed he mustn't have scarfed we mustn't have scarfed you mustn't have scarfed they mustn't have scarfed	I mustn't have been scarfing you mustn't have been scarfing he mustn't have been scarfing we mustn't have been scarfing you mustn't have been scarfing they mustn't 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
mustn't I scarf? mustn't you scarf? mustn't he scarf? mustn't we scarf? mustn't you scarf? mustn't they scarf?	mustn't I be scarfing? mustn't you be scarfing? mustn't he be scarfing? mustn't we be scarfing? mustn't you be scarfing? mustn't they be scarfing?
Perfect	V-ing perfect
mustn't I have scarfed? mustn't you have scarfed? mustn't he have scarfed? mustn't we have scarfed? mustn't you have scarfed? mustn't they have scarfed?	mustn't I have been scarfing? mustn't you have been scarfing? mustn't he have been scarfing? mustn't we have been scarfing? mustn't you have been scarfing? mustn't they have been scarfing?