can travail
Verbo regular: travail - travailed- travailed

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

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

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

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