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