I could wear you could wear he could wear we could wear you could wear they could wear
V-ing form
I could be wearing you could be wearing he could be wearing we could be wearing you could be wearing they could be wearing
Perfect
I could have worn you could have worn he could have worn we could have worn you could have worn they could have worn
V-ing perfect
I could have been wearing you could have been wearing he could have been wearing we could have been wearing you could have been wearing they could have been wearing
Negation
Simple form
I could not wear you could not wear he could not wear we could not wear you could not wear they could not wear
V-ing form
I could not be wearing you could not be wearing he could not be wearing we could not be wearing you could not be wearing they could not be wearing
Perfect
I could not have worn you could not have worn he could not have worn we could not have worn you could not have worn they could not have worn
V-ing perfect
I could not have been wearing you could not have been wearing he could not have been wearing we could not have been wearing you could not have been wearing they could not have been wearing
Interrogative form
Simple form
could I wear? could you wear? could he wear? could we wear? could you wear? could they wear?
V-ing form
could I be wearing? could you be wearing? could he be wearing? could we be wearing? could you be wearing? could they be wearing?
Perfect
could I have worn? could you have worn? could he have worn? could we have worn? could you have worn? could they have worn?
V-ing perfect
could I have been wearing? could you have been wearing? could he have been wearing? could we have been wearing? could you have been wearing? could they have been wearing?
Interro-negative form
Simple form
could I not wear? could you not wear? could he not wear? could we not wear? could you not wear? could they not wear?
V-ing form
could I not be wearing? could you not be wearing? could he not be wearing? could we not be wearing? could you not be wearing? could they not be wearing?
Perfect
could I not have worn? could you not have worn? could he not have worn? could we not have worn? could you not have worn? could they not have worn?
V-ing perfect
could I not have been wearing? could you not have been wearing? could he not have been wearing? could we not have been wearing? could you not have been wearing? could they not have been wearing?