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