could falter
Verbo regular: falter - faltered- faltered

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could falter
you could falter
he could falter
we could falter
you could falter
they could falter 	I could be faltering
you could be faltering
he could be faltering
we could be faltering
you could be faltering
they could be faltering	I could have faltered
you could have faltered
he could have faltered
we could have faltered
you could have faltered
they could have faltered	I could have been faltering
you could have been faltering
he could have been faltering
we could have been faltering
you could have been faltering
they could have been faltering	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not falter
you could not falter
he could not falter
we could not falter
you could not falter
they could not falter 	I could not be faltering
you could not be faltering
he could not be faltering
we could not be faltering
you could not be faltering
they could not be faltering	I could not have faltered
you could not have faltered
he could not have faltered
we could not have faltered
you could not have faltered
they could not have faltered	I could not have been faltering
you could not have been faltering
he could not have been faltering
we could not have been faltering
you could not have been faltering
they could not have been faltering	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I falter?
could you falter?
could he falter?
could we falter?
could you falter?
could they falter? 	could I be faltering?
could you be faltering?
could he be faltering?
could we be faltering?
could you be faltering?
could they be faltering? 	could I have faltered?
could you have faltered?
could he have faltered?
could we have faltered?
could you have faltered?
could they have faltered? 	could I have been faltering?
could you have been faltering?
could he have been faltering?
could we have been faltering?
could you have been faltering?
could they have been faltering? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not falter?
could you not falter?
could he not falter?
could we not falter?
could you not falter?
could they not falter? 	could I not be faltering?
could you not be faltering?
could he not be faltering?
could we not be faltering?
could you not be faltering?
could they not be faltering? 	could I not have faltered?
could you not have faltered?
could he not have faltered?
could we not have faltered?
could you not have faltered?
could they not have faltered? 	could I not have been faltering?
could you not have been faltering?
could he not have been faltering?
could we not have been faltering?
could you not have been faltering?
could they not have been faltering?