must core
Regular verb: core - cored- cored

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must core
you must core
she must core
we must core
you must core
they must core 	I must be coring
you must be coring
she must be coring
we must be coring
you must be coring
they must be coring	I must have cored
you must have cored
she must have cored
we must have cored
you must have cored
they must have cored	I must have been coring
you must have been coring
she must have been coring
we must have been coring
you must have been coring
they must have been coring	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't core
you mustn't core
she mustn't core
we mustn't core
you mustn't core
they mustn't core 	I mustn't be coring
you mustn't be coring
she mustn't be coring
we mustn't be coring
you mustn't be coring
they mustn't be coring	I mustn't have cored
you mustn't have cored
she mustn't have cored
we mustn't have cored
you mustn't have cored
they mustn't have cored	I mustn't have been coring
you mustn't have been coring
she mustn't have been coring
we mustn't have been coring
you mustn't have been coring
they mustn't have been coring	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I core?
must you core?
must she core?
must we core?
must you core?
must they core? 	must I be coring?
must you be coring?
must she be coring?
must we be coring?
must you be coring?
must they be coring? 	must I have cored?
must you have cored?
must she have cored?
must we have cored?
must you have cored?
must they have cored? 	must I have been coring?
must you have been coring?
must she have been coring?
must we have been coring?
must you have been coring?
must they have been coring? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I core?
mustn't you core?
mustn't she core?
mustn't we core?
mustn't you core?
mustn't they core? 	mustn't I be coring?
mustn't you be coring?
mustn't she be coring?
mustn't we be coring?
mustn't you be coring?
mustn't they be coring? 	mustn't I have cored?
mustn't you have cored?
mustn't she have cored?
mustn't we have cored?
mustn't you have cored?
mustn't they have cored? 	mustn't I have been coring?
mustn't you have been coring?
mustn't she have been coring?
mustn't we have been coring?
mustn't you have been coring?
mustn't they have been coring?