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