English verb conjugation
MUST DERAI

Regular verb: derai - deraied - deraied

Affirmation

Simple form	V-ing form
I must derai you must derai he must derai we must derai you must derai they must derai	I must be deraiing you must be deraiing he must be deraiing we must be deraiing you must be deraiing they must be deraiing
Perfect	V-ing perfect
I must have deraied you must have deraied he must have deraied we must have deraied you must have deraied they must have deraied	I must have been deraiing you must have been deraiing he must have been deraiing we must have been deraiing you must have been deraiing they must have been deraiing

Negation

Simple form	V-ing form
I mustn't derai you mustn't derai he mustn't derai we mustn't derai you mustn't derai they mustn't derai	I mustn't be deraiing you mustn't be deraiing he mustn't be deraiing we mustn't be deraiing you mustn't be deraiing they mustn't be deraiing
Perfect	V-ing perfect
I mustn't have deraied you mustn't have deraied he mustn't have deraied we mustn't have deraied you mustn't have deraied they mustn't have deraied	I mustn't have been deraiing you mustn't have been deraiing he mustn't have been deraiing we mustn't have been deraiing you mustn't have been deraiing they mustn't have been deraiing

Interrogative form

Simple form	V-ing form
must I derai? must you derai? must he derai? must we derai? must you derai? must they derai?	must I be deraiing? must you be deraiing? must he be deraiing? must we be deraiing? must you be deraiing? must they be deraiing?
Perfect	V-ing perfect
must I have deraied? must you have deraied? must he have deraied? must we have deraied? must you have deraied? must they have deraied?	must I have been deraiing? must you have been deraiing? must he have been deraiing? must we have been deraiing? must you have been deraiing? must they have been deraiing?

Interro-negative form

Simple form	V-ing form
mustn't I derai? mustn't you derai? mustn't he derai? mustn't we derai? mustn't you derai? mustn't they derai?	mustn't I be deraiing? mustn't you be deraiing? mustn't he be deraiing? mustn't we be deraiing? mustn't you be deraiing? mustn't they be deraiing?
Perfect	V-ing perfect
mustn't I have deraied? mustn't you have deraied? mustn't he have deraied? mustn't we have deraied? mustn't you have deraied? mustn't they have deraied?	mustn't I have been deraiing? mustn't you have been deraiing? mustn't he have been deraiing? mustn't we have been deraiing? mustn't you have been deraiing? mustn't they have been deraiing?