I can sponsor you can sponsor he can sponsor we can sponsor you can sponsor they can sponsor
V-ing form
I can be sponsoring you can be sponsoring he can be sponsoring we can be sponsoring you can be sponsoring they can be sponsoring
Perfect
I can have sponsored you can have sponsored he can have sponsored we can have sponsored you can have sponsored they can have sponsored
V-ing perfect
I can have been sponsoring you can have been sponsoring he can have been sponsoring we can have been sponsoring you can have been sponsoring they can have been sponsoring
Negation
Simple form
I can't sponsor you can't sponsor he can't sponsor we can't sponsor you can't sponsor they can't sponsor
V-ing form
I can't be sponsoring you can't be sponsoring he can't be sponsoring we can't be sponsoring you can't be sponsoring they can't be sponsoring
Perfect
I can't have sponsored you can't have sponsored he can't have sponsored we can't have sponsored you can't have sponsored they can't have sponsored
V-ing perfect
I can't have been sponsoring you can't have been sponsoring he can't have been sponsoring we can't have been sponsoring you can't have been sponsoring they can't have been sponsoring
Interrogative form
Simple form
can I sponsor? can you sponsor? can he sponsor? can we sponsor? can you sponsor? can they sponsor?
V-ing form
can I be sponsoring? can you be sponsoring? can he be sponsoring? can we be sponsoring? can you be sponsoring? can they be sponsoring?
Perfect
can I have sponsored? can you have sponsored? can he have sponsored? can we have sponsored? can you have sponsored? can they have sponsored?
V-ing perfect
can I have been sponsoring? can you have been sponsoring? can he have been sponsoring? can we have been sponsoring? can you have been sponsoring? can they have been sponsoring?
Interro-negative form
Simple form
can't I sponsor? can't you sponsor? can't he sponsor? can't we sponsor? can't you sponsor? can't they sponsor?
V-ing form
can't I be sponsoring? can't you be sponsoring? can't he be sponsoring? can't we be sponsoring? can't you be sponsoring? can't they be sponsoring?
Perfect
can't I have sponsored? can't you have sponsored? can't he have sponsored? can't we have sponsored? can't you have sponsored? can't they have sponsored?
V-ing perfect
can't I have been sponsoring? can't you have been sponsoring? can't he have been sponsoring? can't we have been sponsoring? can't you have been sponsoring? can't they have been sponsoring?