English verb conjugation
MUST GAP

Regular verb: gap - gaped - gaped

Affirmation

Simple form	V-ing form
I must gap you must gap he must gap we must gap you must gap they must gap	I must be gaping you must be gaping he must be gaping we must be gaping you must be gaping they must be gaping
Perfect	V-ing perfect
I must have gaped you must have gaped he must have gaped we must have gaped you must have gaped they must have gaped	I must have been gaping you must have been gaping he must have been gaping we must have been gaping you must have been gaping they must have been gaping

Negation

Simple form	V-ing form
I mustn't gap you mustn't gap he mustn't gap we mustn't gap you mustn't gap they mustn't gap	I mustn't be gaping you mustn't be gaping he mustn't be gaping we mustn't be gaping you mustn't be gaping they mustn't be gaping
Perfect	V-ing perfect
I mustn't have gaped you mustn't have gaped he mustn't have gaped we mustn't have gaped you mustn't have gaped they mustn't have gaped	I mustn't have been gaping you mustn't have been gaping he mustn't have been gaping we mustn't have been gaping you mustn't have been gaping they mustn't have been gaping

Interrogative form

Simple form	V-ing form
must I gap? must you gap? must he gap? must we gap? must you gap? must they gap?	must I be gaping? must you be gaping? must he be gaping? must we be gaping? must you be gaping? must they be gaping?
Perfect	V-ing perfect
must I have gaped? must you have gaped? must he have gaped? must we have gaped? must you have gaped? must they have gaped?	must I have been gaping? must you have been gaping? must he have been gaping? must we have been gaping? must you have been gaping? must they have been gaping?

Interro-negative form

Simple form	V-ing form
mustn't I gap? mustn't you gap? mustn't he gap? mustn't we gap? mustn't you gap? mustn't they gap?	mustn't I be gaping? mustn't you be gaping? mustn't he be gaping? mustn't we be gaping? mustn't you be gaping? mustn't they be gaping?
Perfect	V-ing perfect
mustn't I have gaped? mustn't you have gaped? mustn't he have gaped? mustn't we have gaped? mustn't you have gaped? mustn't they have gaped?	mustn't I have been gaping? mustn't you have been gaping? mustn't he have been gaping? mustn't we have been gaping? mustn't you have been gaping? mustn't they have been gaping?