I could disguise you could disguise she could disguise we could disguise you could disguise they could disguise
V-ing form
I could be disguising you could be disguising she could be disguising we could be disguising you could be disguising they could be disguising
Perfect
I could have disguised you could have disguised she could have disguised we could have disguised you could have disguised they could have disguised
V-ing perfect
I could have been disguising you could have been disguising she could have been disguising we could have been disguising you could have been disguising they could have been disguising
Negation
Simple form
I could not disguise you could not disguise she could not disguise we could not disguise you could not disguise they could not disguise
V-ing form
I could not be disguising you could not be disguising she could not be disguising we could not be disguising you could not be disguising they could not be disguising
Perfect
I could not have disguised you could not have disguised she could not have disguised we could not have disguised you could not have disguised they could not have disguised
V-ing perfect
I could not have been disguising you could not have been disguising she could not have been disguising we could not have been disguising you could not have been disguising they could not have been disguising
Interrogative form
Simple form
could I disguise? could you disguise? could she disguise? could we disguise? could you disguise? could they disguise?
V-ing form
could I be disguising? could you be disguising? could she be disguising? could we be disguising? could you be disguising? could they be disguising?
Perfect
could I have disguised? could you have disguised? could she have disguised? could we have disguised? could you have disguised? could they have disguised?
V-ing perfect
could I have been disguising? could you have been disguising? could she have been disguising? could we have been disguising? could you have been disguising? could they have been disguising?
Interro-negative form
Simple form
could I not disguise? could you not disguise? could she not disguise? could we not disguise? could you not disguise? could they not disguise?
V-ing form
could I not be disguising? could you not be disguising? could she not be disguising? could we not be disguising? could you not be disguising? could they not be disguising?
Perfect
could I not have disguised? could you not have disguised? could she not have disguised? could we not have disguised? could you not have disguised? could they not have disguised?
V-ing perfect
could I not have been disguising? could you not have been disguising? could she not have been disguising? could we not have been disguising? could you not have been disguising? could they not have been disguising?