English verb conjugation
MUST HAP

Regular verb: hap - haped - haped

Affirmation

Simple form	V-ing form
I must hap you must hap he must hap we must hap you must hap they must hap	I must be haping you must be haping he must be haping we must be haping you must be haping they must be haping
Perfect	V-ing perfect
I must have haped you must have haped he must have haped we must have haped you must have haped they must have haped	I must have been haping you must have been haping he must have been haping we must have been haping you must have been haping they must have been haping

Negation

Simple form	V-ing form
I mustn't hap you mustn't hap he mustn't hap we mustn't hap you mustn't hap they mustn't hap	I mustn't be haping you mustn't be haping he mustn't be haping we mustn't be haping you mustn't be haping they mustn't be haping
Perfect	V-ing perfect
I mustn't have haped you mustn't have haped he mustn't have haped we mustn't have haped you mustn't have haped they mustn't have haped	I mustn't have been haping you mustn't have been haping he mustn't have been haping we mustn't have been haping you mustn't have been haping they mustn't have been haping

Interrogative form

Simple form	V-ing form
must I hap? must you hap? must he hap? must we hap? must you hap? must they hap?	must I be haping? must you be haping? must he be haping? must we be haping? must you be haping? must they be haping?
Perfect	V-ing perfect
must I have haped? must you have haped? must he have haped? must we have haped? must you have haped? must they have haped?	must I have been haping? must you have been haping? must he have been haping? must we have been haping? must you have been haping? must they have been haping?

Interro-negative form

Simple form	V-ing form
mustn't I hap? mustn't you hap? mustn't he hap? mustn't we hap? mustn't you hap? mustn't they hap?	mustn't I be haping? mustn't you be haping? mustn't he be haping? mustn't we be haping? mustn't you be haping? mustn't they be haping?
Perfect	V-ing perfect
mustn't I have haped? mustn't you have haped? mustn't he have haped? mustn't we have haped? mustn't you have haped? mustn't they have haped?	mustn't I have been haping? mustn't you have been haping? mustn't he have been haping? mustn't we have been haping? mustn't you have been haping? mustn't they have been haping?