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 can't descend you can't descend he 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 he can't be descending we can't be descending you can't be descending they can't be descending
Perfect	V-ing perfect
I can't have descended you can't have descended he 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 he can't have been descending we can't have been descending you can't have been descending they can't 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't I descend? can't you descend? can't he 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 he be descending? can't we be descending? can't you be descending? can't they be descending?
Perfect	V-ing perfect
can't I have descended? can't you have descended? can't he 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 he have been descending? can't we have been descending? can't you have been descending? can't they have been descending?