could descend
Verbo regular: descend - descended- descended

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could descend
you could descend
he could descend
we could descend
you could descend
they could descend 	I could be descending
you could be descending
he could be descending
we could be descending
you could be descending
they could be descending	I could have descended
you could have descended
he could have descended
we could have descended
you could have descended
they could have descended	I could have been descending
you could have been descending
he could have been descending
we could have been descending
you could have been descending
they could have been descending	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not descend
you could not descend
he could not descend
we could not descend
you could not descend
they could not descend 	I could not be descending
you could not be descending
he could not be descending
we could not be descending
you could not be descending
they could not be descending	I could not have descended
you could not have descended
he could not have descended
we could not have descended
you could not have descended
they could not have descended	I could not have been descending
you could not have been descending
he could not have been descending
we could not have been descending
you could not have been descending
they could not have been descending	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I descend?
could you descend?
could he descend?
could we descend?
could you descend?
could they descend? 	could I be descending?
could you be descending?
could he be descending?
could we be descending?
could you be descending?
could they be descending? 	could I have descended?
could you have descended?
could he have descended?
could we have descended?
could you have descended?
could they have descended? 	could I have been descending?
could you have been descending?
could he have been descending?
could we have been descending?
could you have been descending?
could they have been descending? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not descend?
could you not descend?
could he not descend?
could we not descend?
could you not descend?
could they not descend? 	could I not be descending?
could you not be descending?
could he not be descending?
could we not be descending?
could you not be descending?
could they not be descending? 	could I not have descended?
could you not have descended?
could he not have descended?
could we not have descended?
could you not have descended?
could they not have descended? 	could I not have been descending?
could you not have been descending?
could he not have been descending?
could we not have been descending?
could you not have been descending?
could they not have been descending?