I can ride you can ride she can ride we can ride you can ride they can ride
V-ing form
I can be riding you can be riding she can be riding we can be riding you can be riding they can be riding
Perfect
I can have ridden you can have ridden she can have ridden we can have ridden you can have ridden they can have ridden
V-ing perfect
I can have been riding you can have been riding she can have been riding we can have been riding you can have been riding they can have been riding
Negation
Simple form
I cannot ride you cannot ride she cannot ride we cannot ride you cannot ride they cannot ride
V-ing form
I cannot be riding you cannot be riding she cannot be riding we cannot be riding you cannot be riding they cannot be riding
Perfect
I cannot have ridden you cannot have ridden she cannot have ridden we cannot have ridden you cannot have ridden they cannot have ridden
V-ing perfect
I cannot have been riding you cannot have been riding she cannot have been riding we cannot have been riding you cannot have been riding they cannot have been riding
Interrogative form
Simple form
can I ride? can you ride? can she ride? can we ride? can you ride? can they ride?
V-ing form
can I be riding? can you be riding? can she be riding? can we be riding? can you be riding? can they be riding?
Perfect
can I have ridden? can you have ridden? can she have ridden? can we have ridden? can you have ridden? can they have ridden?
V-ing perfect
can I have been riding? can you have been riding? can she have been riding? can we have been riding? can you have been riding? can they have been riding?
Interro-negative form
Simple form
can I not ride? can you not ride? can she not ride? can we not ride? can you not ride? can they not ride?
V-ing form
can I not be riding? can you not be riding? can she not be riding? can we not be riding? can you not be riding? can they not be riding?
Perfect
can I not have ridden? can you not have ridden? can she not have ridden? can we not have ridden? can you not have ridden? can they not have ridden?
V-ing perfect
can I not have been riding? can you not have been riding? can she not have been riding? can we not have been riding? can you not have been riding? can they not have been riding?