I can hop you can hop he can hop we can hop you can hop they can hop
V-ing form
I can be hopping you can be hopping he can be hopping we can be hopping you can be hopping they can be hopping
Perfect
I can have hopped you can have hopped he can have hopped we can have hopped you can have hopped they can have hopped
V-ing perfect
I can have been hopping you can have been hopping he can have been hopping we can have been hopping you can have been hopping they can have been hopping
Negation
Simple form
I cannot hop you cannot hop he cannot hop we cannot hop you cannot hop they cannot hop
V-ing form
I cannot be hopping you cannot be hopping he cannot be hopping we cannot be hopping you cannot be hopping they cannot be hopping
Perfect
I cannot have hopped you cannot have hopped he cannot have hopped we cannot have hopped you cannot have hopped they cannot have hopped
V-ing perfect
I cannot have been hopping you cannot have been hopping he cannot have been hopping we cannot have been hopping you cannot have been hopping they cannot have been hopping
Interrogative form
Simple form
can I hop? can you hop? can he hop? can we hop? can you hop? can they hop?
V-ing form
can I be hopping? can you be hopping? can he be hopping? can we be hopping? can you be hopping? can they be hopping?
Perfect
can I have hopped? can you have hopped? can he have hopped? can we have hopped? can you have hopped? can they have hopped?
V-ing perfect
can I have been hopping? can you have been hopping? can he have been hopping? can we have been hopping? can you have been hopping? can they have been hopping?
Interro-negative form
Simple form
can I not hop? can you not hop? can he not hop? can we not hop? can you not hop? can they not hop?
V-ing form
can I not be hopping? can you not be hopping? can he not be hopping? can we not be hopping? can you not be hopping? can they not be hopping?
Perfect
can I not have hopped? can you not have hopped? can he not have hopped? can we not have hopped? can you not have hopped? can they not have hopped?
V-ing perfect
can I not have been hopping? can you not have been hopping? can he not have been hopping? can we not have been hopping? can you not have been hopping? can they not have been hopping?