English verb conjugation
MUST CORE

Regular verb: core - cored - cored

Affirmation

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