must copper
Regular verb: copper - coppered- coppered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must copper
you must copper
he must copper
we must copper
you must copper
they must copper 	I must be coppering
you must be coppering
he must be coppering
we must be coppering
you must be coppering
they must be coppering	I must have coppered
you must have coppered
he must have coppered
we must have coppered
you must have coppered
they must have coppered	I must have been coppering
you must have been coppering
he must have been coppering
we must have been coppering
you must have been coppering
they must have been coppering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not copper
you must not copper
he must not copper
we must not copper
you must not copper
they must not copper 	I must not be coppering
you must not be coppering
he must not be coppering
we must not be coppering
you must not be coppering
they must not be coppering	I must not have coppered
you must not have coppered
he must not have coppered
we must not have coppered
you must not have coppered
they must not have coppered	I must not have been coppering
you must not have been coppering
he must not have been coppering
we must not have been coppering
you must not have been coppering
they must not have been coppering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I copper?
must you copper?
must he copper?
must we copper?
must you copper?
must they copper? 	must I be coppering?
must you be coppering?
must he be coppering?
must we be coppering?
must you be coppering?
must they be coppering? 	must I have coppered?
must you have coppered?
must he have coppered?
must we have coppered?
must you have coppered?
must they have coppered? 	must I have been coppering?
must you have been coppering?
must he have been coppering?
must we have been coppering?
must you have been coppering?
must they have been coppering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not copper?
must you not copper?
must he not copper?
must we not copper?
must you not copper?
must they not copper? 	must I not be coppering?
must you not be coppering?
must he not be coppering?
must we not be coppering?
must you not be coppering?
must they not be coppering? 	must I not have coppered?
must you not have coppered?
must he not have coppered?
must we not have coppered?
must you not have coppered?
must they not have coppered? 	must I not have been coppering?
must you not have been coppering?
must he not have been coppering?
must we not have been coppering?
must you not have been coppering?
must they not have been coppering?