Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I could amend amend you could amend amend he could amend amend we could amend amend you could amend amend they could amend amend
V-ing form
I could be amend amending you could be amend amending he could be amend amending we could be amend amending you could be amend amending they could be amend amending
Perfect
I could have amend amended you could have amend amended he could have amend amended we could have amend amended you could have amend amended they could have amend amended
V-ing perfect
I could have been amend amending you could have been amend amending he could have been amend amending we could have been amend amending you could have been amend amending they could have been amend amending
Negation
Simple form
I could not amend amend you could not amend amend he could not amend amend we could not amend amend you could not amend amend they could not amend amend
V-ing form
I could not be amend amending you could not be amend amending he could not be amend amending we could not be amend amending you could not be amend amending they could not be amend amending
Perfect
I could not have amend amended you could not have amend amended he could not have amend amended we could not have amend amended you could not have amend amended they could not have amend amended
V-ing perfect
I could not have been amend amending you could not have been amend amending he could not have been amend amending we could not have been amend amending you could not have been amend amending they could not have been amend amending
Interrogative form
Simple form
could I amend amend? could you amend amend? could he amend amend? could we amend amend? could you amend amend? could they amend amend?
V-ing form
could I be amend amending? could you be amend amending? could he be amend amending? could we be amend amending? could you be amend amending? could they be amend amending?
Perfect
could I have amend amended? could you have amend amended? could he have amend amended? could we have amend amended? could you have amend amended? could they have amend amended?
V-ing perfect
could I have been amend amending? could you have been amend amending? could he have been amend amending? could we have been amend amending? could you have been amend amending? could they have been amend amending?
Interro-negative form
Simple form
could I not amend amend? could you not amend amend? could he not amend amend? could we not amend amend? could you not amend amend? could they not amend amend?
V-ing form
could I not be amend amending? could you not be amend amending? could he not be amend amending? could we not be amend amending? could you not be amend amending? could they not be amend amending?
Perfect
could I not have amend amended? could you not have amend amended? could he not have amend amended? could we not have amend amended? could you not have amend amended? could they not have amend amended?
V-ing perfect
could I not have been amend amending? could you not have been amend amending? could he not have been amend amending? could we not have been amend amending? could you not have been amend amending? could they not have been amend amending?