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