Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I could depurity you could depurity she could depurity we could depurity you could depurity they could depurity
V-ing form
I could be depuritying you could be depuritying she could be depuritying we could be depuritying you could be depuritying they could be depuritying
Perfect
I could have depuritied you could have depuritied she could have depuritied we could have depuritied you could have depuritied they could have depuritied
V-ing perfect
I could have been depuritying you could have been depuritying she could have been depuritying we could have been depuritying you could have been depuritying they could have been depuritying
Negation
Simple form
I couldn't depurity you couldn't depurity she couldn't depurity we couldn't depurity you couldn't depurity they couldn't depurity
V-ing form
I couldn't be depuritying you couldn't be depuritying she couldn't be depuritying we couldn't be depuritying you couldn't be depuritying they couldn't be depuritying
Perfect
I couldn't have depuritied you couldn't have depuritied she couldn't have depuritied we couldn't have depuritied you couldn't have depuritied they couldn't have depuritied
V-ing perfect
I couldn't have been depuritying you couldn't have been depuritying she couldn't have been depuritying we couldn't have been depuritying you couldn't have been depuritying they couldn't have been depuritying
Interrogative form
Simple form
could I depurity? could you depurity? could she depurity? could we depurity? could you depurity? could they depurity?
V-ing form
could I be depuritying? could you be depuritying? could she be depuritying? could we be depuritying? could you be depuritying? could they be depuritying?
Perfect
could I have depuritied? could you have depuritied? could she have depuritied? could we have depuritied? could you have depuritied? could they have depuritied?
V-ing perfect
could I have been depuritying? could you have been depuritying? could she have been depuritying? could we have been depuritying? could you have been depuritying? could they have been depuritying?
Interro-negative form
Simple form
couldn't I depurity? couldn't you depurity? couldn't she depurity? couldn't we depurity? couldn't you depurity? couldn't they depurity?
V-ing form
couldn't I be depuritying? couldn't you be depuritying? couldn't she be depuritying? couldn't we be depuritying? couldn't you be depuritying? couldn't they be depuritying?
Perfect
couldn't I have depuritied? couldn't you have depuritied? couldn't she have depuritied? couldn't we have depuritied? couldn't you have depuritied? couldn't they have depuritied?
V-ing perfect
couldn't I have been depuritying? couldn't you have been depuritying? couldn't she have been depuritying? couldn't we have been depuritying? couldn't you have been depuritying? couldn't they have been depuritying?