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