can travail
Verbo regular: travail - travailed- travailed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can travail
you can travail
he can travail
we can travail
you can travail
they can travail 	I can be travailing
you can be travailing
he can be travailing
we can be travailing
you can be travailing
they can be travailing	I can have travailed
you can have travailed
he 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
he can have been travailing
we can have been travailing
you can have been travailing
they can have been travailing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can't travail
you can't travail
he can't travail
we can't travail
you can't travail
they can't travail 	I can't be travailing
you can't be travailing
he can't be travailing
we can't be travailing
you can't be travailing
they can't be travailing	I can't have travailed
you can't have travailed
he can't have travailed
we can't have travailed
you can't have travailed
they can't have travailed	I can't have been travailing
you can't have been travailing
he can't have been travailing
we can't have been travailing
you can't have been travailing
they can't have been travailing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I travail?
can you travail?
can he travail?
can we travail?
can you travail?
can they travail? 	can I be travailing?
can you be travailing?
can he be travailing?
can we be travailing?
can you be travailing?
can they be travailing? 	can I have travailed?
can you have travailed?
can he 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 he have been travailing?
can we have been travailing?
can you have been travailing?
can they have been travailing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can't I travail?
can't you travail?
can't he travail?
can't we travail?
can't you travail?
can't they travail? 	can't I be travailing?
can't you be travailing?
can't he be travailing?
can't we be travailing?
can't you be travailing?
can't they be travailing? 	can't I have travailed?
can't you have travailed?
can't he have travailed?
can't we have travailed?
can't you have travailed?
can't they have travailed? 	can't I have been travailing?
can't you have been travailing?
can't he have been travailing?
can't we have been travailing?
can't you have been travailing?
can't they have been travailing?