English verb conjugation
MUST HEAP

Regular verb: heap - heaped - heaped

Affirmation

Simple form	V-ing form
I must heap you must heap he must heap we must heap you must heap they must heap	I must be heaping you must be heaping he must be heaping we must be heaping you must be heaping they must be heaping
Perfect	V-ing perfect
I must have heaped you must have heaped he must have heaped we must have heaped you must have heaped they must have heaped	I must have been heaping you must have been heaping he must have been heaping we must have been heaping you must have been heaping they must have been heaping

Negation

Simple form	V-ing form
I mustn't heap you mustn't heap he mustn't heap we mustn't heap you mustn't heap they mustn't heap	I mustn't be heaping you mustn't be heaping he mustn't be heaping we mustn't be heaping you mustn't be heaping they mustn't be heaping
Perfect	V-ing perfect
I mustn't have heaped you mustn't have heaped he mustn't have heaped we mustn't have heaped you mustn't have heaped they mustn't have heaped	I mustn't have been heaping you mustn't have been heaping he mustn't have been heaping we mustn't have been heaping you mustn't have been heaping they mustn't have been heaping

Interrogative form

Simple form	V-ing form
must I heap? must you heap? must he heap? must we heap? must you heap? must they heap?	must I be heaping? must you be heaping? must he be heaping? must we be heaping? must you be heaping? must they be heaping?
Perfect	V-ing perfect
must I have heaped? must you have heaped? must he have heaped? must we have heaped? must you have heaped? must they have heaped?	must I have been heaping? must you have been heaping? must he have been heaping? must we have been heaping? must you have been heaping? must they have been heaping?

Interro-negative form

Simple form	V-ing form
mustn't I heap? mustn't you heap? mustn't he heap? mustn't we heap? mustn't you heap? mustn't they heap?	mustn't I be heaping? mustn't you be heaping? mustn't he be heaping? mustn't we be heaping? mustn't you be heaping? mustn't they be heaping?
Perfect	V-ing perfect
mustn't I have heaped? mustn't you have heaped? mustn't he have heaped? mustn't we have heaped? mustn't you have heaped? mustn't they have heaped?	mustn't I have been heaping? mustn't you have been heaping? mustn't he have been heaping? mustn't we have been heaping? mustn't you have been heaping? mustn't they have been heaping?