English verb conjugation
CAN RETURN

Regular verb: return - returned - returned

Affirmation

Simple form	V-ing form
I can return you can return he can return we can return you can return they can return	I can be returning you can be returning he can be returning we can be returning you can be returning they can be returning
Perfect	V-ing perfect
I can have returned you can have returned he can have returned we can have returned you can have returned they can have returned	I can have been returning you can have been returning he can have been returning we can have been returning you can have been returning they can have been returning

Negation

Simple form	V-ing form
I can't return you can't return he can't return we can't return you can't return they can't return	I can't be returning you can't be returning he can't be returning we can't be returning you can't be returning they can't be returning
Perfect	V-ing perfect
I can't have returned you can't have returned he can't have returned we can't have returned you can't have returned they can't have returned	I can't have been returning you can't have been returning he 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	V-ing form
can I return? can you return? can he return? can we return? can you return? can they return?	can I be returning? can you be returning? can he be returning? can we be returning? can you be returning? can they be returning?
Perfect	V-ing perfect
can I have returned? can you have returned? can he have returned? can we have returned? can you have returned? can they have returned?	can I have been returning? can you have been returning? can he have been returning? can we have been returning? can you have been returning? can they have been returning?

Interro-negative form

Simple form	V-ing form
can't I return? can't you return? can't he return? can't we return? can't you return? can't they return?	can't I be returning? can't you be returning? can't he be returning? can't we be returning? can't you be returning? can't they be returning?
Perfect	V-ing perfect
can't I have returned? can't you have returned? can't he have returned? can't we have returned? can't you have returned? can't they have returned?	can't I have been returning? can't you have been returning? can't he have been returning? can't we have been returning? can't you have been returning? can't they have been returning?