English verb conjugation
MUST SCLAFF

Regular verb: sclaff - sclaffed - sclaffed

Affirmation

Simple form	V-ing form
I must sclaff you must sclaff he must sclaff we must sclaff you must sclaff they must sclaff	I must be sclaffing you must be sclaffing he must be sclaffing we must be sclaffing you must be sclaffing they must be sclaffing
Perfect	V-ing perfect
I must have sclaffed you must have sclaffed he must have sclaffed we must have sclaffed you must have sclaffed they must have sclaffed	I must have been sclaffing you must have been sclaffing he must have been sclaffing we must have been sclaffing you must have been sclaffing they must have been sclaffing

Negation

Simple form	V-ing form
I mustn't sclaff you mustn't sclaff he mustn't sclaff we mustn't sclaff you mustn't sclaff they mustn't sclaff	I mustn't be sclaffing you mustn't be sclaffing he mustn't be sclaffing we mustn't be sclaffing you mustn't be sclaffing they mustn't be sclaffing
Perfect	V-ing perfect
I mustn't have sclaffed you mustn't have sclaffed he mustn't have sclaffed we mustn't have sclaffed you mustn't have sclaffed they mustn't have sclaffed	I mustn't have been sclaffing you mustn't have been sclaffing he mustn't have been sclaffing we mustn't have been sclaffing you mustn't have been sclaffing they mustn't have been sclaffing

Interrogative form

Simple form	V-ing form
must I sclaff? must you sclaff? must he sclaff? must we sclaff? must you sclaff? must they sclaff?	must I be sclaffing? must you be sclaffing? must he be sclaffing? must we be sclaffing? must you be sclaffing? must they be sclaffing?
Perfect	V-ing perfect
must I have sclaffed? must you have sclaffed? must he have sclaffed? must we have sclaffed? must you have sclaffed? must they have sclaffed?	must I have been sclaffing? must you have been sclaffing? must he have been sclaffing? must we have been sclaffing? must you have been sclaffing? must they have been sclaffing?

Interro-negative form

Simple form	V-ing form
mustn't I sclaff? mustn't you sclaff? mustn't he sclaff? mustn't we sclaff? mustn't you sclaff? mustn't they sclaff?	mustn't I be sclaffing? mustn't you be sclaffing? mustn't he be sclaffing? mustn't we be sclaffing? mustn't you be sclaffing? mustn't they be sclaffing?
Perfect	V-ing perfect
mustn't I have sclaffed? mustn't you have sclaffed? mustn't he have sclaffed? mustn't we have sclaffed? mustn't you have sclaffed? mustn't they have sclaffed?	mustn't I have been sclaffing? mustn't you have been sclaffing? mustn't he have been sclaffing? mustn't we have been sclaffing? mustn't you have been sclaffing? mustn't they have been sclaffing?