can descend
Verbo regular: descend - descended- descended

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can descend
you can descend
she can descend
we can descend
you can descend
they can descend 	I can be descending
you can be descending
she can be descending
we can be descending
you can be descending
they can be descending	I can have descended
you can have descended
she can have descended
we can have descended
you can have descended
they can have descended	I can have been descending
you can have been descending
she can have been descending
we can have been descending
you can have been descending
they can have been descending	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can't descend
you can't descend
she can't descend
we can't descend
you can't descend
they can't descend 	I can't be descending
you can't be descending
she can't be descending
we can't be descending
you can't be descending
they can't be descending	I can't have descended
you can't have descended
she can't have descended
we can't have descended
you can't have descended
they can't have descended	I can't have been descending
you can't have been descending
she can't have been descending
we can't have been descending
you can't have been descending
they can't have been descending	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I descend?
can you descend?
can she descend?
can we descend?
can you descend?
can they descend? 	can I be descending?
can you be descending?
can she be descending?
can we be descending?
can you be descending?
can they be descending? 	can I have descended?
can you have descended?
can she have descended?
can we have descended?
can you have descended?
can they have descended? 	can I have been descending?
can you have been descending?
can she have been descending?
can we have been descending?
can you have been descending?
can they have been descending? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can't I descend?
can't you descend?
can't she descend?
can't we descend?
can't you descend?
can't they descend? 	can't I be descending?
can't you be descending?
can't she be descending?
can't we be descending?
can't you be descending?
can't they be descending? 	can't I have descended?
can't you have descended?
can't she have descended?
can't we have descended?
can't you have descended?
can't they have descended? 	can't I have been descending?
can't you have been descending?
can't she have been descending?
can't we have been descending?
can't you have been descending?
can't they have been descending?