I can falter you can falter he can falter we can falter you can falter they can falter
Forma com V-ing
I can be faltering you can be faltering he can be faltering we can be faltering you can be faltering they can be faltering
Perfeito
I can have faltered you can have faltered he can have faltered we can have faltered you can have faltered they can have faltered
Perfeito com V-ing
I can have been faltering you can have been faltering he can have been faltering we can have been faltering you can have been faltering they can have been faltering
Negação
Forma simple
I cannot falter you cannot falter he cannot falter we cannot falter you cannot falter they cannot falter
Forma com V-ing
I cannot be faltering you cannot be faltering he cannot be faltering we cannot be faltering you cannot be faltering they cannot be faltering
Perfeito
I cannot have faltered you cannot have faltered he cannot have faltered we cannot have faltered you cannot have faltered they cannot have faltered
Perfeito com V-ing
I cannot have been faltering you cannot have been faltering he cannot have been faltering we cannot have been faltering you cannot have been faltering they cannot have been faltering
Forma interrogativa
Forma simple
can I falter? can you falter? can he falter? can we falter? can you falter? can they falter?
Forma com V-ing
can I be faltering? can you be faltering? can he be faltering? can we be faltering? can you be faltering? can they be faltering?
Perfeito
can I have faltered? can you have faltered? can he have faltered? can we have faltered? can you have faltered? can they have faltered?
Perfeito com V-ing
can I have been faltering? can you have been faltering? can he have been faltering? can we have been faltering? can you have been faltering? can they have been faltering?
Forma interro-Negação
Forma simple
can I not falter? can you not falter? can he not falter? can we not falter? can you not falter? can they not falter?
Forma com V-ing
can I not be faltering? can you not be faltering? can he not be faltering? can we not be faltering? can you not be faltering? can they not be faltering?
Perfeito
can I not have faltered? can you not have faltered? can he not have faltered? can we not have faltered? can you not have faltered? can they not have faltered?
Perfeito com V-ing
can I not have been faltering? can you not have been faltering? can he not have been faltering? can we not have been faltering? can you not have been faltering? can they not have been faltering?