must copper
Regular verb: copper - coppered- coppered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must copper
you must copper
she must copper
we must copper
you must copper
they must copper 	I must be coppering
you must be coppering
she must be coppering
we must be coppering
you must be coppering
they must be coppering	I must have coppered
you must have coppered
she 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
she 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 mustn't copper
you mustn't copper
she mustn't copper
we mustn't copper
you mustn't copper
they mustn't copper 	I mustn't be coppering
you mustn't be coppering
she mustn't be coppering
we mustn't be coppering
you mustn't be coppering
they mustn't be coppering	I mustn't have coppered
you mustn't have coppered
she mustn't have coppered
we mustn't have coppered
you mustn't have coppered
they mustn't have coppered	I mustn't have been coppering
you mustn't have been coppering
she mustn't have been coppering
we mustn't have been coppering
you mustn't have been coppering
they mustn't have been coppering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I copper?
must you copper?
must she copper?
must we copper?
must you copper?
must they copper? 	must I be coppering?
must you be coppering?
must she be coppering?
must we be coppering?
must you be coppering?
must they be coppering? 	must I have coppered?
must you have coppered?
must she 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 she 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 	
mustn't I copper?
mustn't you copper?
mustn't she copper?
mustn't we copper?
mustn't you copper?
mustn't they copper? 	mustn't I be coppering?
mustn't you be coppering?
mustn't she be coppering?
mustn't we be coppering?
mustn't you be coppering?
mustn't they be coppering? 	mustn't I have coppered?
mustn't you have coppered?
mustn't she have coppered?
mustn't we have coppered?
mustn't you have coppered?
mustn't they have coppered? 	mustn't I have been coppering?
mustn't you have been coppering?
mustn't she have been coppering?
mustn't we have been coppering?
mustn't you have been coppering?
mustn't they have been coppering?