I could shear you could shear he could shear we could shear you could shear they could shear
V-ing form
I could be shearing you could be shearing he could be shearing we could be shearing you could be shearing they could be shearing
Perfect
I could have sheared, shorn you could have sheared, shorn he could have sheared, shorn we could have sheared, shorn you could have sheared, shorn they could have sheared, shorn
V-ing perfect
I could have been shearing you could have been shearing he could have been shearing we could have been shearing you could have been shearing they could have been shearing
Negation
Simple form
I could not shear you could not shear he could not shear we could not shear you could not shear they could not shear
V-ing form
I could not be shearing you could not be shearing he could not be shearing we could not be shearing you could not be shearing they could not be shearing
Perfect
I could not have sheared, shorn you could not have sheared, shorn he could not have sheared, shorn we could not have sheared, shorn you could not have sheared, shorn they could not have sheared, shorn
V-ing perfect
I could not have been shearing you could not have been shearing he could not have been shearing we could not have been shearing you could not have been shearing they could not have been shearing
Interrogative form
Simple form
could I shear? could you shear? could he shear? could we shear? could you shear? could they shear?
V-ing form
could I be shearing? could you be shearing? could he be shearing? could we be shearing? could you be shearing? could they be shearing?
Perfect
could I have sheared, shorn? could you have sheared, shorn? could he have sheared, shorn? could we have sheared, shorn? could you have sheared, shorn? could they have sheared, shorn?
V-ing perfect
could I have been shearing? could you have been shearing? could he have been shearing? could we have been shearing? could you have been shearing? could they have been shearing?
Interro-negative form
Simple form
could I not shear? could you not shear? could he not shear? could we not shear? could you not shear? could they not shear?
V-ing form
could I not be shearing? could you not be shearing? could he not be shearing? could we not be shearing? could you not be shearing? could they not be shearing?
Perfect
could I not have sheared, shorn? could you not have sheared, shorn? could he not have sheared, shorn? could we not have sheared, shorn? could you not have sheared, shorn? could they not have sheared, shorn?
V-ing perfect
could I not have been shearing? could you not have been shearing? could he not have been shearing? could we not have been shearing? could you not have been shearing? could they not have been shearing?