must coffer
Regular verb: coffer - coffered- coffered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must coffer
you must coffer
she must coffer
we must coffer
you must coffer
they must coffer 	I must be coffering
you must be coffering
she must be coffering
we must be coffering
you must be coffering
they must be coffering	I must have coffered
you must have coffered
she must have coffered
we must have coffered
you must have coffered
they must have coffered	I must have been coffering
you must have been coffering
she must have been coffering
we must have been coffering
you must have been coffering
they must have been coffering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not coffer
you must not coffer
she must not coffer
we must not coffer
you must not coffer
they must not coffer 	I must not be coffering
you must not be coffering
she must not be coffering
we must not be coffering
you must not be coffering
they must not be coffering	I must not have coffered
you must not have coffered
she must not have coffered
we must not have coffered
you must not have coffered
they must not have coffered	I must not have been coffering
you must not have been coffering
she must not have been coffering
we must not have been coffering
you must not have been coffering
they must not have been coffering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I coffer?
must you coffer?
must she coffer?
must we coffer?
must you coffer?
must they coffer? 	must I be coffering?
must you be coffering?
must she be coffering?
must we be coffering?
must you be coffering?
must they be coffering? 	must I have coffered?
must you have coffered?
must she have coffered?
must we have coffered?
must you have coffered?
must they have coffered? 	must I have been coffering?
must you have been coffering?
must she have been coffering?
must we have been coffering?
must you have been coffering?
must they have been coffering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not coffer?
must you not coffer?
must she not coffer?
must we not coffer?
must you not coffer?
must they not coffer? 	must I not be coffering?
must you not be coffering?
must she not be coffering?
must we not be coffering?
must you not be coffering?
must they not be coffering? 	must I not have coffered?
must you not have coffered?
must she not have coffered?
must we not have coffered?
must you not have coffered?
must they not have coffered? 	must I not have been coffering?
must you not have been coffering?
must she not have been coffering?
must we not have been coffering?
must you not have been coffering?
must they not have been coffering?