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