I could wring you could wring he could wring we could wring you could wring they could wring
V-ing form
I could be wringing you could be wringing he could be wringing we could be wringing you could be wringing they could be wringing
Perfect
I could have wrung you could have wrung he could have wrung we could have wrung you could have wrung they could have wrung
V-ing perfect
I could have been wringing you could have been wringing he could have been wringing we could have been wringing you could have been wringing they could have been wringing
Negation
Simple form
I couldn't wring you couldn't wring he couldn't wring we couldn't wring you couldn't wring they couldn't wring
V-ing form
I couldn't be wringing you couldn't be wringing he couldn't be wringing we couldn't be wringing you couldn't be wringing they couldn't be wringing
Perfect
I couldn't have wrung you couldn't have wrung he couldn't have wrung we couldn't have wrung you couldn't have wrung they couldn't have wrung
V-ing perfect
I couldn't have been wringing you couldn't have been wringing he couldn't have been wringing we couldn't have been wringing you couldn't have been wringing they couldn't have been wringing
Interrogative form
Simple form
could I wring? could you wring? could he wring? could we wring? could you wring? could they wring?
V-ing form
could I be wringing? could you be wringing? could he be wringing? could we be wringing? could you be wringing? could they be wringing?
Perfect
could I have wrung? could you have wrung? could he have wrung? could we have wrung? could you have wrung? could they have wrung?
V-ing perfect
could I have been wringing? could you have been wringing? could he have been wringing? could we have been wringing? could you have been wringing? could they have been wringing?
Interro-negative form
Simple form
couldn't I wring? couldn't you wring? couldn't he wring? couldn't we wring? couldn't you wring? couldn't they wring?
V-ing form
couldn't I be wringing? couldn't you be wringing? couldn't he be wringing? couldn't we be wringing? couldn't you be wringing? couldn't they be wringing?
Perfect
couldn't I have wrung? couldn't you have wrung? couldn't he have wrung? couldn't we have wrung? couldn't you have wrung? couldn't they have wrung?
V-ing perfect
couldn't I have been wringing? couldn't you have been wringing? couldn't he have been wringing? couldn't we have been wringing? couldn't you have been wringing? couldn't they have been wringing?