English verb conjugation
CAN DESCEND

Regular verb: descend - descended - descended

Affirmation

Simple form	V-ing form
I can descend you can descend he can descend we can descend you can descend they can descend	I can be descending you can be descending he can be descending we can be descending you can be descending they can be descending
Perfect	V-ing perfect
I can have descended you can have descended he 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 he can have been descending we can have been descending you can have been descending they can have been descending

Negation

Simple form	V-ing form
I cannot descend you cannot descend he cannot descend we cannot descend you cannot descend they cannot descend	I cannot be descending you cannot be descending he cannot be descending we cannot be descending you cannot be descending they cannot be descending
Perfect	V-ing perfect
I cannot have descended you cannot have descended he cannot have descended we cannot have descended you cannot have descended they cannot have descended	I cannot have been descending you cannot have been descending he cannot have been descending we cannot have been descending you cannot have been descending they cannot have been descending

Interrogative form

Simple form	V-ing form
can I descend? can you descend? can he descend? can we descend? can you descend? can they descend?	can I be descending? can you be descending? can he be descending? can we be descending? can you be descending? can they be descending?
Perfect	V-ing perfect
can I have descended? can you have descended? can he 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 he have been descending? can we have been descending? can you have been descending? can they have been descending?

Interro-negative form

Simple form	V-ing form
can I not descend? can you not descend? can he not descend? can we not descend? can you not descend? can they not descend?	can I not be descending? can you not be descending? can he not be descending? can we not be descending? can you not be descending? can they not be descending?
Perfect	V-ing perfect
can I not have descended? can you not have descended? can he not have descended? can we not have descended? can you not have descended? can they not have descended?	can I not have been descending? can you not have been descending? can he not have been descending? can we not have been descending? can you not have been descending? can they not have been descending?