I could wear you could wear she could wear we could wear you could wear they could wear
V-ing form
I could be wearing you could be wearing she could be wearing we could be wearing you could be wearing they could be wearing
Perfect
I could have worn you could have worn she 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 she 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 she 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 she 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 she 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 she 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 she wear? could we wear? could you wear? could they wear?
V-ing form
could I be wearing? could you be wearing? could she be wearing? could we be wearing? could you be wearing? could they be wearing?
Perfect
could I have worn? could you have worn? could she 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 she 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 she 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 she 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 she 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 she not have been wearing? could we not have been wearing? could you not have been wearing? could they not have been wearing?