I can return you can return she can return we can return you can return they can return
V-ing form
I can be returning you can be returning she can be returning we can be returning you can be returning they can be returning
Perfect
I can have returned you can have returned she can have returned we can have returned you can have returned they can have returned
V-ing perfect
I can have been returning you can have been returning she can have been returning we can have been returning you can have been returning they can have been returning
Negation
Simple form
I can't return you can't return she can't return we can't return you can't return they can't return
V-ing form
I can't be returning you can't be returning she can't be returning we can't be returning you can't be returning they can't be returning
Perfect
I can't have returned you can't have returned she can't have returned we can't have returned you can't have returned they can't have returned
V-ing perfect
I can't have been returning you can't have been returning she can't have been returning we can't have been returning you can't have been returning they can't have been returning
Interrogative form
Simple form
can I return? can you return? can she return? can we return? can you return? can they return?
V-ing form
can I be returning? can you be returning? can she be returning? can we be returning? can you be returning? can they be returning?
Perfect
can I have returned? can you have returned? can she have returned? can we have returned? can you have returned? can they have returned?
V-ing perfect
can I have been returning? can you have been returning? can she have been returning? can we have been returning? can you have been returning? can they have been returning?
Interro-negative form
Simple form
can't I return? can't you return? can't she return? can't we return? can't you return? can't they return?
V-ing form
can't I be returning? can't you be returning? can't she be returning? can't we be returning? can't you be returning? can't they be returning?
Perfect
can't I have returned? can't you have returned? can't she have returned? can't we have returned? can't you have returned? can't they have returned?
V-ing perfect
can't I have been returning? can't you have been returning? can't she have been returning? can't we have been returning? can't you have been returning? can't they have been returning?