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 must not heap you must not heap he must not heap we must not heap you must not heap they must not heap	I must not be heaping you must not be heaping he must not be heaping we must not be heaping you must not be heaping they must not be heaping
Perfect	V-ing perfect
I must not have heaped you must not have heaped he must not have heaped we must not have heaped you must not have heaped they must not have heaped	I must not have been heaping you must not have been heaping he must not have been heaping we must not have been heaping you must not have been heaping they must not 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
must I not heap? must you not heap? must he not heap? must we not heap? must you not heap? must they not heap?	must I not be heaping? must you not be heaping? must he not be heaping? must we not be heaping? must you not be heaping? must they not be heaping?
Perfect	V-ing perfect
must I not have heaped? must you not have heaped? must he not have heaped? must we not have heaped? must you not have heaped? must they not have heaped?	must I not have been heaping? must you not have been heaping? must he not have been heaping? must we not have been heaping? must you not have been heaping? must they not have been heaping?