must culm
Regular verb: culm - culmed- culmed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must culm
you must culm
he must culm
we must culm
you must culm
they must culm 	I must be culming
you must be culming
he must be culming
we must be culming
you must be culming
they must be culming	I must have culmed
you must have culmed
he must have culmed
we must have culmed
you must have culmed
they must have culmed	I must have been culming
you must have been culming
he must have been culming
we must have been culming
you must have been culming
they must have been culming	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not culm
you must not culm
he must not culm
we must not culm
you must not culm
they must not culm 	I must not be culming
you must not be culming
he must not be culming
we must not be culming
you must not be culming
they must not be culming	I must not have culmed
you must not have culmed
he must not have culmed
we must not have culmed
you must not have culmed
they must not have culmed	I must not have been culming
you must not have been culming
he must not have been culming
we must not have been culming
you must not have been culming
they must not have been culming	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I culm?
must you culm?
must he culm?
must we culm?
must you culm?
must they culm? 	must I be culming?
must you be culming?
must he be culming?
must we be culming?
must you be culming?
must they be culming? 	must I have culmed?
must you have culmed?
must he have culmed?
must we have culmed?
must you have culmed?
must they have culmed? 	must I have been culming?
must you have been culming?
must he have been culming?
must we have been culming?
must you have been culming?
must they have been culming? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not culm?
must you not culm?
must he not culm?
must we not culm?
must you not culm?
must they not culm? 	must I not be culming?
must you not be culming?
must he not be culming?
must we not be culming?
must you not be culming?
must they not be culming? 	must I not have culmed?
must you not have culmed?
must he not have culmed?
must we not have culmed?
must you not have culmed?
must they not have culmed? 	must I not have been culming?
must you not have been culming?
must he not have been culming?
must we not have been culming?
must you not have been culming?
must they not have been culming?