English verb conjugation
MUST REEF

Regular verb: reef - reefed - reefed

Affirmation

Simple form	V-ing form
I must reef you must reef she must reef we must reef you must reef they must reef	I must be reefing you must be reefing she must be reefing we must be reefing you must be reefing they must be reefing
Perfect	V-ing perfect
I must have reefed you must have reefed she must have reefed we must have reefed you must have reefed they must have reefed	I must have been reefing you must have been reefing she must have been reefing we must have been reefing you must have been reefing they must have been reefing

Negation

Simple form	V-ing form
I must not reef you must not reef she must not reef we must not reef you must not reef they must not reef	I must not be reefing you must not be reefing she must not be reefing we must not be reefing you must not be reefing they must not be reefing
Perfect	V-ing perfect
I must not have reefed you must not have reefed she must not have reefed we must not have reefed you must not have reefed they must not have reefed	I must not have been reefing you must not have been reefing she must not have been reefing we must not have been reefing you must not have been reefing they must not have been reefing

Interrogative form

Simple form	V-ing form
must I reef? must you reef? must she reef? must we reef? must you reef? must they reef?	must I be reefing? must you be reefing? must she be reefing? must we be reefing? must you be reefing? must they be reefing?
Perfect	V-ing perfect
must I have reefed? must you have reefed? must she have reefed? must we have reefed? must you have reefed? must they have reefed?	must I have been reefing? must you have been reefing? must she have been reefing? must we have been reefing? must you have been reefing? must they have been reefing?

Interro-negative form

Simple form	V-ing form
must I not reef? must you not reef? must she not reef? must we not reef? must you not reef? must they not reef?	must I not be reefing? must you not be reefing? must she not be reefing? must we not be reefing? must you not be reefing? must they not be reefing?
Perfect	V-ing perfect
must I not have reefed? must you not have reefed? must she not have reefed? must we not have reefed? must you not have reefed? must they not have reefed?	must I not have been reefing? must you not have been reefing? must she not have been reefing? must we not have been reefing? must you not have been reefing? must they not have been reefing?