I could wince you could wince she could wince we could wince you could wince they could wince
V-ing form
I could be wincing you could be wincing she could be wincing we could be wincing you could be wincing they could be wincing
Perfect
I could have winced you could have winced she could have winced we could have winced you could have winced they could have winced
V-ing perfect
I could have been wincing you could have been wincing she could have been wincing we could have been wincing you could have been wincing they could have been wincing
Negation
Simple form
I could not wince you could not wince she could not wince we could not wince you could not wince they could not wince
V-ing form
I could not be wincing you could not be wincing she could not be wincing we could not be wincing you could not be wincing they could not be wincing
Perfect
I could not have winced you could not have winced she could not have winced we could not have winced you could not have winced they could not have winced
V-ing perfect
I could not have been wincing you could not have been wincing she could not have been wincing we could not have been wincing you could not have been wincing they could not have been wincing
Interrogative form
Simple form
could I wince? could you wince? could she wince? could we wince? could you wince? could they wince?
V-ing form
could I be wincing? could you be wincing? could she be wincing? could we be wincing? could you be wincing? could they be wincing?
Perfect
could I have winced? could you have winced? could she have winced? could we have winced? could you have winced? could they have winced?
V-ing perfect
could I have been wincing? could you have been wincing? could she have been wincing? could we have been wincing? could you have been wincing? could they have been wincing?
Interro-negative form
Simple form
could I not wince? could you not wince? could she not wince? could we not wince? could you not wince? could they not wince?
V-ing form
could I not be wincing? could you not be wincing? could she not be wincing? could we not be wincing? could you not be wincing? could they not be wincing?
Perfect
could I not have winced? could you not have winced? could she not have winced? could we not have winced? could you not have winced? could they not have winced?
V-ing perfect
could I not have been wincing? could you not have been wincing? could she not have been wincing? could we not have been wincing? could you not have been wincing? could they not have been wincing?