must flail
Verbo regular: flail - flailed- flailed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must flail
you must flail
he must flail
we must flail
you must flail
they must flail 	I must be flailing
you must be flailing
he must be flailing
we must be flailing
you must be flailing
they must be flailing	I must have flailed
you must have flailed
he must have flailed
we must have flailed
you must have flailed
they must have flailed	I must have been flailing
you must have been flailing
he must have been flailing
we must have been flailing
you must have been flailing
they must have been flailing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mustn't flail
you mustn't flail
he mustn't flail
we mustn't flail
you mustn't flail
they mustn't flail 	I mustn't be flailing
you mustn't be flailing
he mustn't be flailing
we mustn't be flailing
you mustn't be flailing
they mustn't be flailing	I mustn't have flailed
you mustn't have flailed
he mustn't have flailed
we mustn't have flailed
you mustn't have flailed
they mustn't have flailed	I mustn't have been flailing
you mustn't have been flailing
he mustn't have been flailing
we mustn't have been flailing
you mustn't have been flailing
they mustn't have been flailing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I flail?
must you flail?
must he flail?
must we flail?
must you flail?
must they flail? 	must I be flailing?
must you be flailing?
must he be flailing?
must we be flailing?
must you be flailing?
must they be flailing? 	must I have flailed?
must you have flailed?
must he have flailed?
must we have flailed?
must you have flailed?
must they have flailed? 	must I have been flailing?
must you have been flailing?
must he have been flailing?
must we have been flailing?
must you have been flailing?
must they have been flailing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mustn't I flail?
mustn't you flail?
mustn't he flail?
mustn't we flail?
mustn't you flail?
mustn't they flail? 	mustn't I be flailing?
mustn't you be flailing?
mustn't he be flailing?
mustn't we be flailing?
mustn't you be flailing?
mustn't they be flailing? 	mustn't I have flailed?
mustn't you have flailed?
mustn't he have flailed?
mustn't we have flailed?
mustn't you have flailed?
mustn't they have flailed? 	mustn't I have been flailing?
mustn't you have been flailing?
mustn't he have been flailing?
mustn't we have been flailing?
mustn't you have been flailing?
mustn't they have been flailing?