could curtail
Verbo regular: curtail - curtailed- curtailed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could curtail
you could curtail
he could curtail
we could curtail
you could curtail
they could curtail 	I could be curtailing
you could be curtailing
he could be curtailing
we could be curtailing
you could be curtailing
they could be curtailing	I could have curtailed
you could have curtailed
he could have curtailed
we could have curtailed
you could have curtailed
they could have curtailed	I could have been curtailing
you could have been curtailing
he could have been curtailing
we could have been curtailing
you could have been curtailing
they could have been curtailing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not curtail
you could not curtail
he could not curtail
we could not curtail
you could not curtail
they could not curtail 	I could not be curtailing
you could not be curtailing
he could not be curtailing
we could not be curtailing
you could not be curtailing
they could not be curtailing	I could not have curtailed
you could not have curtailed
he could not have curtailed
we could not have curtailed
you could not have curtailed
they could not have curtailed	I could not have been curtailing
you could not have been curtailing
he could not have been curtailing
we could not have been curtailing
you could not have been curtailing
they could not have been curtailing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I curtail?
could you curtail?
could he curtail?
could we curtail?
could you curtail?
could they curtail? 	could I be curtailing?
could you be curtailing?
could he be curtailing?
could we be curtailing?
could you be curtailing?
could they be curtailing? 	could I have curtailed?
could you have curtailed?
could he have curtailed?
could we have curtailed?
could you have curtailed?
could they have curtailed? 	could I have been curtailing?
could you have been curtailing?
could he have been curtailing?
could we have been curtailing?
could you have been curtailing?
could they have been curtailing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not curtail?
could you not curtail?
could he not curtail?
could we not curtail?
could you not curtail?
could they not curtail? 	could I not be curtailing?
could you not be curtailing?
could he not be curtailing?
could we not be curtailing?
could you not be curtailing?
could they not be curtailing? 	could I not have curtailed?
could you not have curtailed?
could he not have curtailed?
could we not have curtailed?
could you not have curtailed?
could they not have curtailed? 	could I not have been curtailing?
could you not have been curtailing?
could he not have been curtailing?
could we not have been curtailing?
could you not have been curtailing?
could they not have been curtailing?