could travail
Verbo regular: travail - travailed- travailed

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

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not travail
you could not travail
she could not travail
we could not travail
you could not travail
they could not travail 	I could not be travailing
you could not be travailing
she could not be travailing
we could not be travailing
you could not be travailing
they could not be travailing	I could not have travailed
you could not have travailed
she could not have travailed
we could not have travailed
you could not have travailed
they could not have travailed	I could not have been travailing
you could not have been travailing
she could not have been travailing
we could not have been travailing
you could not have been travailing
they could not have been travailing	

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

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