must derai
Verbo regular: derai - deraied- deraied

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
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	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	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
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	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	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
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? 	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? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
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? 	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?