I could clangor you could clangor he could clangor we could clangor you could clangor they could clangor
V-ing form
I could be clangoring you could be clangoring he could be clangoring we could be clangoring you could be clangoring they could be clangoring
Perfect
I could have clangored you could have clangored he could have clangored we could have clangored you could have clangored they could have clangored
V-ing perfect
I could have been clangoring you could have been clangoring he could have been clangoring we could have been clangoring you could have been clangoring they could have been clangoring
Negation
Simple form
I could not clangor you could not clangor he could not clangor we could not clangor you could not clangor they could not clangor
V-ing form
I could not be clangoring you could not be clangoring he could not be clangoring we could not be clangoring you could not be clangoring they could not be clangoring
Perfect
I could not have clangored you could not have clangored he could not have clangored we could not have clangored you could not have clangored they could not have clangored
V-ing perfect
I could not have been clangoring you could not have been clangoring he could not have been clangoring we could not have been clangoring you could not have been clangoring they could not have been clangoring
Interrogative form
Simple form
could I clangor? could you clangor? could he clangor? could we clangor? could you clangor? could they clangor?
V-ing form
could I be clangoring? could you be clangoring? could he be clangoring? could we be clangoring? could you be clangoring? could they be clangoring?
Perfect
could I have clangored? could you have clangored? could he have clangored? could we have clangored? could you have clangored? could they have clangored?
V-ing perfect
could I have been clangoring? could you have been clangoring? could he have been clangoring? could we have been clangoring? could you have been clangoring? could they have been clangoring?
Interro-negative form
Simple form
could I not clangor? could you not clangor? could he not clangor? could we not clangor? could you not clangor? could they not clangor?
V-ing form
could I not be clangoring? could you not be clangoring? could he not be clangoring? could we not be clangoring? could you not be clangoring? could they not be clangoring?
Perfect
could I not have clangored? could you not have clangored? could he not have clangored? could we not have clangored? could you not have clangored? could they not have clangored?
V-ing perfect
could I not have been clangoring? could you not have been clangoring? could he not have been clangoring? could we not have been clangoring? could you not have been clangoring? could they not have been clangoring?