English verb conjugation
MUST CUPEL

Regular verb: cupel - cupeled - cupeled

Affirmation

Simple form	V-ing form
I must cupel you must cupel she must cupel we must cupel you must cupel they must cupel	I must be cupeling you must be cupeling she must be cupeling we must be cupeling you must be cupeling they must be cupeling
Perfect	V-ing perfect
I must have cupeled you must have cupeled she must have cupeled we must have cupeled you must have cupeled they must have cupeled	I must have been cupeling you must have been cupeling she must have been cupeling we must have been cupeling you must have been cupeling they must have been cupeling

Negation

Simple form	V-ing form
I mustn't cupel you mustn't cupel she mustn't cupel we mustn't cupel you mustn't cupel they mustn't cupel	I mustn't be cupeling you mustn't be cupeling she mustn't be cupeling we mustn't be cupeling you mustn't be cupeling they mustn't be cupeling
Perfect	V-ing perfect
I mustn't have cupeled you mustn't have cupeled she mustn't have cupeled we mustn't have cupeled you mustn't have cupeled they mustn't have cupeled	I mustn't have been cupeling you mustn't have been cupeling she mustn't have been cupeling we mustn't have been cupeling you mustn't have been cupeling they mustn't have been cupeling

Interrogative form

Simple form	V-ing form
must I cupel? must you cupel? must she cupel? must we cupel? must you cupel? must they cupel?	must I be cupeling? must you be cupeling? must she be cupeling? must we be cupeling? must you be cupeling? must they be cupeling?
Perfect	V-ing perfect
must I have cupeled? must you have cupeled? must she have cupeled? must we have cupeled? must you have cupeled? must they have cupeled?	must I have been cupeling? must you have been cupeling? must she have been cupeling? must we have been cupeling? must you have been cupeling? must they have been cupeling?

Interro-negative form

Simple form	V-ing form
mustn't I cupel? mustn't you cupel? mustn't she cupel? mustn't we cupel? mustn't you cupel? mustn't they cupel?	mustn't I be cupeling? mustn't you be cupeling? mustn't she be cupeling? mustn't we be cupeling? mustn't you be cupeling? mustn't they be cupeling?
Perfect	V-ing perfect
mustn't I have cupeled? mustn't you have cupeled? mustn't she have cupeled? mustn't we have cupeled? mustn't you have cupeled? mustn't they have cupeled?	mustn't I have been cupeling? mustn't you have been cupeling? mustn't she have been cupeling? mustn't we have been cupeling? mustn't you have been cupeling? mustn't they have been cupeling?