I could waffle you could waffle she could waffle we could waffle you could waffle they could waffle
V-ing form
I could be waffling you could be waffling she could be waffling we could be waffling you could be waffling they could be waffling
Perfect
I could have waffled you could have waffled she could have waffled we could have waffled you could have waffled they could have waffled
V-ing perfect
I could have been waffling you could have been waffling she could have been waffling we could have been waffling you could have been waffling they could have been waffling
Negation
Simple form
I could not waffle you could not waffle she could not waffle we could not waffle you could not waffle they could not waffle
V-ing form
I could not be waffling you could not be waffling she could not be waffling we could not be waffling you could not be waffling they could not be waffling
Perfect
I could not have waffled you could not have waffled she could not have waffled we could not have waffled you could not have waffled they could not have waffled
V-ing perfect
I could not have been waffling you could not have been waffling she could not have been waffling we could not have been waffling you could not have been waffling they could not have been waffling
Interrogative form
Simple form
could I waffle? could you waffle? could she waffle? could we waffle? could you waffle? could they waffle?
V-ing form
could I be waffling? could you be waffling? could she be waffling? could we be waffling? could you be waffling? could they be waffling?
Perfect
could I have waffled? could you have waffled? could she have waffled? could we have waffled? could you have waffled? could they have waffled?
V-ing perfect
could I have been waffling? could you have been waffling? could she have been waffling? could we have been waffling? could you have been waffling? could they have been waffling?
Interro-negative form
Simple form
could I not waffle? could you not waffle? could she not waffle? could we not waffle? could you not waffle? could they not waffle?
V-ing form
could I not be waffling? could you not be waffling? could she not be waffling? could we not be waffling? could you not be waffling? could they not be waffling?
Perfect
could I not have waffled? could you not have waffled? could she not have waffled? could we not have waffled? could you not have waffled? could they not have waffled?
V-ing perfect
could I not have been waffling? could you not have been waffling? could she not have been waffling? could we not have been waffling? could you not have been waffling? could they not have been waffling?