I could muzzle you could muzzle she could muzzle we could muzzle you could muzzle they could muzzle
V-ing form
I could be muzzling you could be muzzling she could be muzzling we could be muzzling you could be muzzling they could be muzzling
Perfect
I could have muzzled you could have muzzled she 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 she 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 she 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 she 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 she 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 she 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 she muzzle? could we muzzle? could you muzzle? could they muzzle?
V-ing form
could I be muzzling? could you be muzzling? could she be muzzling? could we be muzzling? could you be muzzling? could they be muzzling?
Perfect
could I have muzzled? could you have muzzled? could she 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 she 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 she 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 she 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 she 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 she not have been muzzling? could we not have been muzzling? could you not have been muzzling? could they not have been muzzling?