I can contest you can contest he can contest we can contest you can contest they can contest
Forma com V-ing
I can be contesting you can be contesting he can be contesting we can be contesting you can be contesting they can be contesting
Perfeito
I can have contested you can have contested he can have contested we can have contested you can have contested they can have contested
Perfeito com V-ing
I can have been contesting you can have been contesting he can have been contesting we can have been contesting you can have been contesting they can have been contesting
Negação
Forma simple
I can't contest you can't contest he can't contest we can't contest you can't contest they can't contest
Forma com V-ing
I can't be contesting you can't be contesting he can't be contesting we can't be contesting you can't be contesting they can't be contesting
Perfeito
I can't have contested you can't have contested he can't have contested we can't have contested you can't have contested they can't have contested
Perfeito com V-ing
I can't have been contesting you can't have been contesting he can't have been contesting we can't have been contesting you can't have been contesting they can't have been contesting
Forma interrogativa
Forma simple
can I contest? can you contest? can he contest? can we contest? can you contest? can they contest?
Forma com V-ing
can I be contesting? can you be contesting? can he be contesting? can we be contesting? can you be contesting? can they be contesting?
Perfeito
can I have contested? can you have contested? can he have contested? can we have contested? can you have contested? can they have contested?
Perfeito com V-ing
can I have been contesting? can you have been contesting? can he have been contesting? can we have been contesting? can you have been contesting? can they have been contesting?
Forma interro-Negação
Forma simple
can't I contest? can't you contest? can't he contest? can't we contest? can't you contest? can't they contest?
Forma com V-ing
can't I be contesting? can't you be contesting? can't he be contesting? can't we be contesting? can't you be contesting? can't they be contesting?
Perfeito
can't I have contested? can't you have contested? can't he have contested? can't we have contested? can't you have contested? can't they have contested?
Perfeito com V-ing
can't I have been contesting? can't you have been contesting? can't he have been contesting? can't we have been contesting? can't you have been contesting? can't they have been contesting?