English verb conjugation
MUST RETROSPECT

Regular verb: retrospect - retrospected - retrospected

Affirmation

Simple form	V-ing form
I must retrospect you must retrospect he must retrospect we must retrospect you must retrospect they must retrospect	I must be retrospecting you must be retrospecting he must be retrospecting we must be retrospecting you must be retrospecting they must be retrospecting
Perfect	V-ing perfect
I must have retrospected you must have retrospected he must have retrospected we must have retrospected you must have retrospected they must have retrospected	I must have been retrospecting you must have been retrospecting he must have been retrospecting we must have been retrospecting you must have been retrospecting they must have been retrospecting

Negation

Simple form	V-ing form
I must not retrospect you must not retrospect he must not retrospect we must not retrospect you must not retrospect they must not retrospect	I must not be retrospecting you must not be retrospecting he must not be retrospecting we must not be retrospecting you must not be retrospecting they must not be retrospecting
Perfect	V-ing perfect
I must not have retrospected you must not have retrospected he must not have retrospected we must not have retrospected you must not have retrospected they must not have retrospected	I must not have been retrospecting you must not have been retrospecting he must not have been retrospecting we must not have been retrospecting you must not have been retrospecting they must not have been retrospecting

Interrogative form

Simple form	V-ing form
must I retrospect? must you retrospect? must he retrospect? must we retrospect? must you retrospect? must they retrospect?	must I be retrospecting? must you be retrospecting? must he be retrospecting? must we be retrospecting? must you be retrospecting? must they be retrospecting?
Perfect	V-ing perfect
must I have retrospected? must you have retrospected? must he have retrospected? must we have retrospected? must you have retrospected? must they have retrospected?	must I have been retrospecting? must you have been retrospecting? must he have been retrospecting? must we have been retrospecting? must you have been retrospecting? must they have been retrospecting?

Interro-negative form

Simple form	V-ing form
must I not retrospect? must you not retrospect? must he not retrospect? must we not retrospect? must you not retrospect? must they not retrospect?	must I not be retrospecting? must you not be retrospecting? must he not be retrospecting? must we not be retrospecting? must you not be retrospecting? must they not be retrospecting?
Perfect	V-ing perfect
must I not have retrospected? must you not have retrospected? must he not have retrospected? must we not have retrospected? must you not have retrospected? must they not have retrospected?	must I not have been retrospecting? must you not have been retrospecting? must he not have been retrospecting? must we not have been retrospecting? must you not have been retrospecting? must they not have been retrospecting?