English verb conjugation
COULD SPONSOR

Regular verb: sponsor - sponsored - sponsored

Affirmation

Simple form	V-ing form
I could sponsor you could sponsor he could sponsor we could sponsor you could sponsor they could sponsor	I could be sponsoring you could be sponsoring he could be sponsoring we could be sponsoring you could be sponsoring they could be sponsoring
Perfect	V-ing perfect
I could have sponsored you could have sponsored he could have sponsored we could have sponsored you could have sponsored they could have sponsored	I could have been sponsoring you could have been sponsoring he could have been sponsoring we could have been sponsoring you could have been sponsoring they could have been sponsoring

Negation

Simple form	V-ing form
I couldn't sponsor you couldn't sponsor he couldn't sponsor we couldn't sponsor you couldn't sponsor they couldn't sponsor	I couldn't be sponsoring you couldn't be sponsoring he couldn't be sponsoring we couldn't be sponsoring you couldn't be sponsoring they couldn't be sponsoring
Perfect	V-ing perfect
I couldn't have sponsored you couldn't have sponsored he couldn't have sponsored we couldn't have sponsored you couldn't have sponsored they couldn't have sponsored	I couldn't have been sponsoring you couldn't have been sponsoring he couldn't have been sponsoring we couldn't have been sponsoring you couldn't have been sponsoring they couldn't have been sponsoring

Interrogative form

Simple form	V-ing form
could I sponsor? could you sponsor? could he sponsor? could we sponsor? could you sponsor? could they sponsor?	could I be sponsoring? could you be sponsoring? could he be sponsoring? could we be sponsoring? could you be sponsoring? could they be sponsoring?
Perfect	V-ing perfect
could I have sponsored? could you have sponsored? could he have sponsored? could we have sponsored? could you have sponsored? could they have sponsored?	could I have been sponsoring? could you have been sponsoring? could he have been sponsoring? could we have been sponsoring? could you have been sponsoring? could they have been sponsoring?

Interro-negative form

Simple form	V-ing form
couldn't I sponsor? couldn't you sponsor? couldn't he sponsor? couldn't we sponsor? couldn't you sponsor? couldn't they sponsor?	couldn't I be sponsoring? couldn't you be sponsoring? couldn't he be sponsoring? couldn't we be sponsoring? couldn't you be sponsoring? couldn't they be sponsoring?
Perfect	V-ing perfect
couldn't I have sponsored? couldn't you have sponsored? couldn't he have sponsored? couldn't we have sponsored? couldn't you have sponsored? couldn't they have sponsored?	couldn't I have been sponsoring? couldn't you have been sponsoring? couldn't he have been sponsoring? couldn't we have been sponsoring? couldn't you have been sponsoring? couldn't they have been sponsoring?