I could motorbike you could motorbike he could motorbike we could motorbike you could motorbike they could motorbike
V-ing form
I could be motorbiking you could be motorbiking he could be motorbiking we could be motorbiking you could be motorbiking they could be motorbiking
Perfect
I could have motorbiked you could have motorbiked he could have motorbiked we could have motorbiked you could have motorbiked they could have motorbiked
V-ing perfect
I could have been motorbiking you could have been motorbiking he could have been motorbiking we could have been motorbiking you could have been motorbiking they could have been motorbiking
Negation
Simple form
I could not motorbike you could not motorbike he could not motorbike we could not motorbike you could not motorbike they could not motorbike
V-ing form
I could not be motorbiking you could not be motorbiking he could not be motorbiking we could not be motorbiking you could not be motorbiking they could not be motorbiking
Perfect
I could not have motorbiked you could not have motorbiked he could not have motorbiked we could not have motorbiked you could not have motorbiked they could not have motorbiked
V-ing perfect
I could not have been motorbiking you could not have been motorbiking he could not have been motorbiking we could not have been motorbiking you could not have been motorbiking they could not have been motorbiking
Interrogative form
Simple form
could I motorbike? could you motorbike? could he motorbike? could we motorbike? could you motorbike? could they motorbike?
V-ing form
could I be motorbiking? could you be motorbiking? could he be motorbiking? could we be motorbiking? could you be motorbiking? could they be motorbiking?
Perfect
could I have motorbiked? could you have motorbiked? could he have motorbiked? could we have motorbiked? could you have motorbiked? could they have motorbiked?
V-ing perfect
could I have been motorbiking? could you have been motorbiking? could he have been motorbiking? could we have been motorbiking? could you have been motorbiking? could they have been motorbiking?
Interro-negative form
Simple form
could I not motorbike? could you not motorbike? could he not motorbike? could we not motorbike? could you not motorbike? could they not motorbike?
V-ing form
could I not be motorbiking? could you not be motorbiking? could he not be motorbiking? could we not be motorbiking? could you not be motorbiking? could they not be motorbiking?
Perfect
could I not have motorbiked? could you not have motorbiked? could he not have motorbiked? could we not have motorbiked? could you not have motorbiked? could they not have motorbiked?
V-ing perfect
could I not have been motorbiking? could you not have been motorbiking? could he not have been motorbiking? could we not have been motorbiking? could you not have been motorbiking? could they not have been motorbiking?