must reef
Regular verb: reef - reefed- reefed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
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? 	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 	Perfect 	V-ing perfect 	
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? 	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?