I could befool you could befool she could befool we could befool you could befool they could befool
V-ing form
I could be befooling you could be befooling she could be befooling we could be befooling you could be befooling they could be befooling
Perfect
I could have befooled you could have befooled she could have befooled we could have befooled you could have befooled they could have befooled
V-ing perfect
I could have been befooling you could have been befooling she could have been befooling we could have been befooling you could have been befooling they could have been befooling
Negation
Simple form
I could not befool you could not befool she could not befool we could not befool you could not befool they could not befool
V-ing form
I could not be befooling you could not be befooling she could not be befooling we could not be befooling you could not be befooling they could not be befooling
Perfect
I could not have befooled you could not have befooled she could not have befooled we could not have befooled you could not have befooled they could not have befooled
V-ing perfect
I could not have been befooling you could not have been befooling she could not have been befooling we could not have been befooling you could not have been befooling they could not have been befooling
Interrogative form
Simple form
could I befool? could you befool? could she befool? could we befool? could you befool? could they befool?
V-ing form
could I be befooling? could you be befooling? could she be befooling? could we be befooling? could you be befooling? could they be befooling?
Perfect
could I have befooled? could you have befooled? could she have befooled? could we have befooled? could you have befooled? could they have befooled?
V-ing perfect
could I have been befooling? could you have been befooling? could she have been befooling? could we have been befooling? could you have been befooling? could they have been befooling?
Interro-negative form
Simple form
could I not befool? could you not befool? could she not befool? could we not befool? could you not befool? could they not befool?
V-ing form
could I not be befooling? could you not be befooling? could she not be befooling? could we not be befooling? could you not be befooling? could they not be befooling?
Perfect
could I not have befooled? could you not have befooled? could she not have befooled? could we not have befooled? could you not have befooled? could they not have befooled?
V-ing perfect
could I not have been befooling? could you not have been befooling? could she not have been befooling? could we not have been befooling? could you not have been befooling? could they not have been befooling?