I can cycle you can cycle he can cycle we can cycle you can cycle they can cycle
V-ing form
I can be cycling you can be cycling he can be cycling we can be cycling you can be cycling they can be cycling
Perfect
I can have cycled you can have cycled he can have cycled we can have cycled you can have cycled they can have cycled
V-ing perfect
I can have been cycling you can have been cycling he can have been cycling we can have been cycling you can have been cycling they can have been cycling
Negation
Simple form
I can't cycle you can't cycle he can't cycle we can't cycle you can't cycle they can't cycle
V-ing form
I can't be cycling you can't be cycling he can't be cycling we can't be cycling you can't be cycling they can't be cycling
Perfect
I can't have cycled you can't have cycled he can't have cycled we can't have cycled you can't have cycled they can't have cycled
V-ing perfect
I can't have been cycling you can't have been cycling he can't have been cycling we can't have been cycling you can't have been cycling they can't have been cycling
Interrogative form
Simple form
can I cycle? can you cycle? can he cycle? can we cycle? can you cycle? can they cycle?
V-ing form
can I be cycling? can you be cycling? can he be cycling? can we be cycling? can you be cycling? can they be cycling?
Perfect
can I have cycled? can you have cycled? can he have cycled? can we have cycled? can you have cycled? can they have cycled?
V-ing perfect
can I have been cycling? can you have been cycling? can he have been cycling? can we have been cycling? can you have been cycling? can they have been cycling?
Interro-negative form
Simple form
can't I cycle? can't you cycle? can't he cycle? can't we cycle? can't you cycle? can't they cycle?
V-ing form
can't I be cycling? can't you be cycling? can't he be cycling? can't we be cycling? can't you be cycling? can't they be cycling?
Perfect
can't I have cycled? can't you have cycled? can't he have cycled? can't we have cycled? can't you have cycled? can't they have cycled?
V-ing perfect
can't I have been cycling? can't you have been cycling? can't he have been cycling? can't we have been cycling? can't you have been cycling? can't they have been cycling?