I could encircle you could encircle he could encircle we could encircle you could encircle they could encircle
V-ing form
I could be encircling you could be encircling he could be encircling we could be encircling you could be encircling they could be encircling
Perfect
I could have encircled you could have encircled he could have encircled we could have encircled you could have encircled they could have encircled
V-ing perfect
I could have been encircling you could have been encircling he could have been encircling we could have been encircling you could have been encircling they could have been encircling
Negation
Simple form
I could not encircle you could not encircle he could not encircle we could not encircle you could not encircle they could not encircle
V-ing form
I could not be encircling you could not be encircling he could not be encircling we could not be encircling you could not be encircling they could not be encircling
Perfect
I could not have encircled you could not have encircled he could not have encircled we could not have encircled you could not have encircled they could not have encircled
V-ing perfect
I could not have been encircling you could not have been encircling he could not have been encircling we could not have been encircling you could not have been encircling they could not have been encircling
Interrogative form
Simple form
could I encircle? could you encircle? could he encircle? could we encircle? could you encircle? could they encircle?
V-ing form
could I be encircling? could you be encircling? could he be encircling? could we be encircling? could you be encircling? could they be encircling?
Perfect
could I have encircled? could you have encircled? could he have encircled? could we have encircled? could you have encircled? could they have encircled?
V-ing perfect
could I have been encircling? could you have been encircling? could he have been encircling? could we have been encircling? could you have been encircling? could they have been encircling?
Interro-negative form
Simple form
could I not encircle? could you not encircle? could he not encircle? could we not encircle? could you not encircle? could they not encircle?
V-ing form
could I not be encircling? could you not be encircling? could he not be encircling? could we not be encircling? could you not be encircling? could they not be encircling?
Perfect
could I not have encircled? could you not have encircled? could he not have encircled? could we not have encircled? could you not have encircled? could they not have encircled?
V-ing perfect
could I not have been encircling? could you not have been encircling? could he not have been encircling? could we not have been encircling? could you not have been encircling? could they not have been encircling?