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 couldn't motorbike you couldn't motorbike he couldn't motorbike we couldn't motorbike you couldn't motorbike they couldn't motorbike
V-ing form
I couldn't be motorbiking you couldn't be motorbiking he couldn't be motorbiking we couldn't be motorbiking you couldn't be motorbiking they couldn't be motorbiking
Perfect
I couldn't have motorbiked you couldn't have motorbiked he couldn't have motorbiked we couldn't have motorbiked you couldn't have motorbiked they couldn't have motorbiked
V-ing perfect
I couldn't have been motorbiking you couldn't have been motorbiking he couldn't have been motorbiking we couldn't have been motorbiking you couldn't have been motorbiking they couldn't 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
couldn't I motorbike? couldn't you motorbike? couldn't he motorbike? couldn't we motorbike? couldn't you motorbike? couldn't they motorbike?
V-ing form
couldn't I be motorbiking? couldn't you be motorbiking? couldn't he be motorbiking? couldn't we be motorbiking? couldn't you be motorbiking? couldn't they be motorbiking?
Perfect
couldn't I have motorbiked? couldn't you have motorbiked? couldn't he have motorbiked? couldn't we have motorbiked? couldn't you have motorbiked? couldn't they have motorbiked?
V-ing perfect
couldn't I have been motorbiking? couldn't you have been motorbiking? couldn't he have been motorbiking? couldn't we have been motorbiking? couldn't you have been motorbiking? couldn't they have been motorbiking?