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