I can prealter you can prealter she can prealter we can prealter you can prealter they can prealter
Forma com V-ing
I can be prealtering you can be prealtering she can be prealtering we can be prealtering you can be prealtering they can be prealtering
Perfeito
I can have prealtered you can have prealtered she can have prealtered we can have prealtered you can have prealtered they can have prealtered
Perfeito com V-ing
I can have been prealtering you can have been prealtering she can have been prealtering we can have been prealtering you can have been prealtering they can have been prealtering
Negação
Forma simple
I cannot prealter you cannot prealter she cannot prealter we cannot prealter you cannot prealter they cannot prealter
Forma com V-ing
I cannot be prealtering you cannot be prealtering she cannot be prealtering we cannot be prealtering you cannot be prealtering they cannot be prealtering
Perfeito
I cannot have prealtered you cannot have prealtered she cannot have prealtered we cannot have prealtered you cannot have prealtered they cannot have prealtered
Perfeito com V-ing
I cannot have been prealtering you cannot have been prealtering she cannot have been prealtering we cannot have been prealtering you cannot have been prealtering they cannot have been prealtering
Forma interrogativa
Forma simple
can I prealter? can you prealter? can she prealter? can we prealter? can you prealter? can they prealter?
Forma com V-ing
can I be prealtering? can you be prealtering? can she be prealtering? can we be prealtering? can you be prealtering? can they be prealtering?
Perfeito
can I have prealtered? can you have prealtered? can she have prealtered? can we have prealtered? can you have prealtered? can they have prealtered?
Perfeito com V-ing
can I have been prealtering? can you have been prealtering? can she have been prealtering? can we have been prealtering? can you have been prealtering? can they have been prealtering?
Forma interro-Negação
Forma simple
can I not prealter? can you not prealter? can she not prealter? can we not prealter? can you not prealter? can they not prealter?
Forma com V-ing
can I not be prealtering? can you not be prealtering? can she not be prealtering? can we not be prealtering? can you not be prealtering? can they not be prealtering?
Perfeito
can I not have prealtered? can you not have prealtered? can she not have prealtered? can we not have prealtered? can you not have prealtered? can they not have prealtered?
Perfeito com V-ing
can I not have been prealtering? can you not have been prealtering? can she not have been prealtering? can we not have been prealtering? can you not have been prealtering? can they not have been prealtering?