I could muzzle you could muzzle he could muzzle we could muzzle you could muzzle they could muzzle
V-ing form
I could be muzzling you could be muzzling he could be muzzling we could be muzzling you could be muzzling they could be muzzling
Perfect
I could have muzzled you could have muzzled he could have muzzled we could have muzzled you could have muzzled they could have muzzled
V-ing perfect
I could have been muzzling you could have been muzzling he could have been muzzling we could have been muzzling you could have been muzzling they could have been muzzling
Negation
Simple form
I could not muzzle you could not muzzle he could not muzzle we could not muzzle you could not muzzle they could not muzzle
V-ing form
I could not be muzzling you could not be muzzling he could not be muzzling we could not be muzzling you could not be muzzling they could not be muzzling
Perfect
I could not have muzzled you could not have muzzled he could not have muzzled we could not have muzzled you could not have muzzled they could not have muzzled
V-ing perfect
I could not have been muzzling you could not have been muzzling he could not have been muzzling we could not have been muzzling you could not have been muzzling they could not have been muzzling
Interrogative form
Simple form
could I muzzle? could you muzzle? could he muzzle? could we muzzle? could you muzzle? could they muzzle?
V-ing form
could I be muzzling? could you be muzzling? could he be muzzling? could we be muzzling? could you be muzzling? could they be muzzling?
Perfect
could I have muzzled? could you have muzzled? could he have muzzled? could we have muzzled? could you have muzzled? could they have muzzled?
V-ing perfect
could I have been muzzling? could you have been muzzling? could he have been muzzling? could we have been muzzling? could you have been muzzling? could they have been muzzling?
Interro-negative form
Simple form
could I not muzzle? could you not muzzle? could he not muzzle? could we not muzzle? could you not muzzle? could they not muzzle?
V-ing form
could I not be muzzling? could you not be muzzling? could he not be muzzling? could we not be muzzling? could you not be muzzling? could they not be muzzling?
Perfect
could I not have muzzled? could you not have muzzled? could he not have muzzled? could we not have muzzled? could you not have muzzled? could they not have muzzled?
V-ing perfect
could I not have been muzzling? could you not have been muzzling? could he not have been muzzling? could we not have been muzzling? could you not have been muzzling? could they not have been muzzling?