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