English verb conjugation
MUST HELICOPTER

Regular verb: helicopter - helicoptered - helicoptered

Affirmation

Simple form	V-ing form
I must helicopter you must helicopter he must helicopter we must helicopter you must helicopter they must helicopter	I must be helicoptering you must be helicoptering he must be helicoptering we must be helicoptering you must be helicoptering they must be helicoptering
Perfect	V-ing perfect
I must have helicoptered you must have helicoptered he must have helicoptered we must have helicoptered you must have helicoptered they must have helicoptered	I must have been helicoptering you must have been helicoptering he must have been helicoptering we must have been helicoptering you must have been helicoptering they must have been helicoptering

Negation

Simple form	V-ing form
I must not helicopter you must not helicopter he must not helicopter we must not helicopter you must not helicopter they must not helicopter	I must not be helicoptering you must not be helicoptering he must not be helicoptering we must not be helicoptering you must not be helicoptering they must not be helicoptering
Perfect	V-ing perfect
I must not have helicoptered you must not have helicoptered he must not have helicoptered we must not have helicoptered you must not have helicoptered they must not have helicoptered	I must not have been helicoptering you must not have been helicoptering he must not have been helicoptering we must not have been helicoptering you must not have been helicoptering they must not have been helicoptering

Interrogative form

Simple form	V-ing form
must I helicopter? must you helicopter? must he helicopter? must we helicopter? must you helicopter? must they helicopter?	must I be helicoptering? must you be helicoptering? must he be helicoptering? must we be helicoptering? must you be helicoptering? must they be helicoptering?
Perfect	V-ing perfect
must I have helicoptered? must you have helicoptered? must he have helicoptered? must we have helicoptered? must you have helicoptered? must they have helicoptered?	must I have been helicoptering? must you have been helicoptering? must he have been helicoptering? must we have been helicoptering? must you have been helicoptering? must they have been helicoptering?

Interro-negative form

Simple form	V-ing form
must I not helicopter? must you not helicopter? must he not helicopter? must we not helicopter? must you not helicopter? must they not helicopter?	must I not be helicoptering? must you not be helicoptering? must he not be helicoptering? must we not be helicoptering? must you not be helicoptering? must they not be helicoptering?
Perfect	V-ing perfect
must I not have helicoptered? must you not have helicoptered? must he not have helicoptered? must we not have helicoptered? must you not have helicoptered? must they not have helicoptered?	must I not have been helicoptering? must you not have been helicoptering? must he not have been helicoptering? must we not have been helicoptering? must you not have been helicoptering? must they not have been helicoptering?