must travail
Verbo regular: travail - travailed- travailed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must travail
you must travail
she must travail
we must travail
you must travail
they must travail 	I must be travailing
you must be travailing
she must be travailing
we must be travailing
you must be travailing
they must be travailing	I must have travailed
you must have travailed
she must have travailed
we must have travailed
you must have travailed
they must have travailed	I must have been travailing
you must have been travailing
she must have been travailing
we must have been travailing
you must have been travailing
they must have been travailing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mustn't travail
you mustn't travail
she mustn't travail
we mustn't travail
you mustn't travail
they mustn't travail 	I mustn't be travailing
you mustn't be travailing
she mustn't be travailing
we mustn't be travailing
you mustn't be travailing
they mustn't be travailing	I mustn't have travailed
you mustn't have travailed
she mustn't have travailed
we mustn't have travailed
you mustn't have travailed
they mustn't have travailed	I mustn't have been travailing
you mustn't have been travailing
she mustn't have been travailing
we mustn't have been travailing
you mustn't have been travailing
they mustn't have been travailing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I travail?
must you travail?
must she travail?
must we travail?
must you travail?
must they travail? 	must I be travailing?
must you be travailing?
must she be travailing?
must we be travailing?
must you be travailing?
must they be travailing? 	must I have travailed?
must you have travailed?
must she have travailed?
must we have travailed?
must you have travailed?
must they have travailed? 	must I have been travailing?
must you have been travailing?
must she have been travailing?
must we have been travailing?
must you have been travailing?
must they have been travailing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mustn't I travail?
mustn't you travail?
mustn't she travail?
mustn't we travail?
mustn't you travail?
mustn't they travail? 	mustn't I be travailing?
mustn't you be travailing?
mustn't she be travailing?
mustn't we be travailing?
mustn't you be travailing?
mustn't they be travailing? 	mustn't I have travailed?
mustn't you have travailed?
mustn't she have travailed?
mustn't we have travailed?
mustn't you have travailed?
mustn't they have travailed? 	mustn't I have been travailing?
mustn't you have been travailing?
mustn't she have been travailing?
mustn't we have been travailing?
mustn't you have been travailing?
mustn't they have been travailing?