I could regale you could regale she could regale we could regale you could regale they could regale
V-ing form
I could be regaling you could be regaling she could be regaling we could be regaling you could be regaling they could be regaling
Perfect
I could have regaled you could have regaled she could have regaled we could have regaled you could have regaled they could have regaled
V-ing perfect
I could have been regaling you could have been regaling she could have been regaling we could have been regaling you could have been regaling they could have been regaling
Negation
Simple form
I could not regale you could not regale she could not regale we could not regale you could not regale they could not regale
V-ing form
I could not be regaling you could not be regaling she could not be regaling we could not be regaling you could not be regaling they could not be regaling
Perfect
I could not have regaled you could not have regaled she could not have regaled we could not have regaled you could not have regaled they could not have regaled
V-ing perfect
I could not have been regaling you could not have been regaling she could not have been regaling we could not have been regaling you could not have been regaling they could not have been regaling
Interrogative form
Simple form
could I regale? could you regale? could she regale? could we regale? could you regale? could they regale?
V-ing form
could I be regaling? could you be regaling? could she be regaling? could we be regaling? could you be regaling? could they be regaling?
Perfect
could I have regaled? could you have regaled? could she have regaled? could we have regaled? could you have regaled? could they have regaled?
V-ing perfect
could I have been regaling? could you have been regaling? could she have been regaling? could we have been regaling? could you have been regaling? could they have been regaling?
Interro-negative form
Simple form
could I not regale? could you not regale? could she not regale? could we not regale? could you not regale? could they not regale?
V-ing form
could I not be regaling? could you not be regaling? could she not be regaling? could we not be regaling? could you not be regaling? could they not be regaling?
Perfect
could I not have regaled? could you not have regaled? could she not have regaled? could we not have regaled? could you not have regaled? could they not have regaled?
V-ing perfect
could I not have been regaling? could you not have been regaling? could she not have been regaling? could we not have been regaling? could you not have been regaling? could they not have been regaling?