I could bunko you could bunko he could bunko we could bunko you could bunko they could bunko
V-ing form
I could be bunkoing you could be bunkoing he could be bunkoing we could be bunkoing you could be bunkoing they could be bunkoing
Perfect
I could have bunkoed you could have bunkoed he could have bunkoed we could have bunkoed you could have bunkoed they could have bunkoed
V-ing perfect
I could have been bunkoing you could have been bunkoing he could have been bunkoing we could have been bunkoing you could have been bunkoing they could have been bunkoing
Negation
Simple form
I could not bunko you could not bunko he could not bunko we could not bunko you could not bunko they could not bunko
V-ing form
I could not be bunkoing you could not be bunkoing he could not be bunkoing we could not be bunkoing you could not be bunkoing they could not be bunkoing
Perfect
I could not have bunkoed you could not have bunkoed he could not have bunkoed we could not have bunkoed you could not have bunkoed they could not have bunkoed
V-ing perfect
I could not have been bunkoing you could not have been bunkoing he could not have been bunkoing we could not have been bunkoing you could not have been bunkoing they could not have been bunkoing
Interrogative form
Simple form
could I bunko? could you bunko? could he bunko? could we bunko? could you bunko? could they bunko?
V-ing form
could I be bunkoing? could you be bunkoing? could he be bunkoing? could we be bunkoing? could you be bunkoing? could they be bunkoing?
Perfect
could I have bunkoed? could you have bunkoed? could he have bunkoed? could we have bunkoed? could you have bunkoed? could they have bunkoed?
V-ing perfect
could I have been bunkoing? could you have been bunkoing? could he have been bunkoing? could we have been bunkoing? could you have been bunkoing? could they have been bunkoing?
Interro-negative form
Simple form
could I not bunko? could you not bunko? could he not bunko? could we not bunko? could you not bunko? could they not bunko?
V-ing form
could I not be bunkoing? could you not be bunkoing? could he not be bunkoing? could we not be bunkoing? could you not be bunkoing? could they not be bunkoing?
Perfect
could I not have bunkoed? could you not have bunkoed? could he not have bunkoed? could we not have bunkoed? could you not have bunkoed? could they not have bunkoed?
V-ing perfect
could I not have been bunkoing? could you not have been bunkoing? could he not have been bunkoing? could we not have been bunkoing? could you not have been bunkoing? could they not have been bunkoing?