I could bay you could bay she could bay we could bay you could bay they could bay
V-ing form
I could be baying you could be baying she could be baying we could be baying you could be baying they could be baying
Perfect
I could have bayed you could have bayed she could have bayed we could have bayed you could have bayed they could have bayed
V-ing perfect
I could have been baying you could have been baying she could have been baying we could have been baying you could have been baying they could have been baying
Negation
Simple form
I could not bay you could not bay she could not bay we could not bay you could not bay they could not bay
V-ing form
I could not be baying you could not be baying she could not be baying we could not be baying you could not be baying they could not be baying
Perfect
I could not have bayed you could not have bayed she could not have bayed we could not have bayed you could not have bayed they could not have bayed
V-ing perfect
I could not have been baying you could not have been baying she could not have been baying we could not have been baying you could not have been baying they could not have been baying
Interrogative form
Simple form
could I bay? could you bay? could she bay? could we bay? could you bay? could they bay?
V-ing form
could I be baying? could you be baying? could she be baying? could we be baying? could you be baying? could they be baying?
Perfect
could I have bayed? could you have bayed? could she have bayed? could we have bayed? could you have bayed? could they have bayed?
V-ing perfect
could I have been baying? could you have been baying? could she have been baying? could we have been baying? could you have been baying? could they have been baying?
Interro-negative form
Simple form
could I not bay? could you not bay? could she not bay? could we not bay? could you not bay? could they not bay?
V-ing form
could I not be baying? could you not be baying? could she not be baying? could we not be baying? could you not be baying? could they not be baying?
Perfect
could I not have bayed? could you not have bayed? could she not have bayed? could we not have bayed? could you not have bayed? could they not have bayed?
V-ing perfect
could I not have been baying? could you not have been baying? could she not have been baying? could we not have been baying? could you not have been baying? could they not have been baying?