I must convince you must convince he must convince we must convince you must convince they must convince
V-ing form
I must be convincing you must be convincing he must be convincing we must be convincing you must be convincing they must be convincing
Perfect
I must have convinced you must have convinced he must have convinced we must have convinced you must have convinced they must have convinced
V-ing perfect
I must have been convincing you must have been convincing he must have been convincing we must have been convincing you must have been convincing they must have been convincing
Negation
Simple form
I must not convince you must not convince he must not convince we must not convince you must not convince they must not convince
V-ing form
I must not be convincing you must not be convincing he must not be convincing we must not be convincing you must not be convincing they must not be convincing
Perfect
I must not have convinced you must not have convinced he must not have convinced we must not have convinced you must not have convinced they must not have convinced
V-ing perfect
I must not have been convincing you must not have been convincing he must not have been convincing we must not have been convincing you must not have been convincing they must not have been convincing
Interrogative form
Simple form
must I convince? must you convince? must he convince? must we convince? must you convince? must they convince?
V-ing form
must I be convincing? must you be convincing? must he be convincing? must we be convincing? must you be convincing? must they be convincing?
Perfect
must I have convinced? must you have convinced? must he have convinced? must we have convinced? must you have convinced? must they have convinced?
V-ing perfect
must I have been convincing? must you have been convincing? must he have been convincing? must we have been convincing? must you have been convincing? must they have been convincing?
Interro-negative form
Simple form
must I not convince? must you not convince? must he not convince? must we not convince? must you not convince? must they not convince?
V-ing form
must I not be convincing? must you not be convincing? must he not be convincing? must we not be convincing? must you not be convincing? must they not be convincing?
Perfect
must I not have convinced? must you not have convinced? must he not have convinced? must we not have convinced? must you not have convinced? must they not have convinced?
V-ing perfect
must I not have been convincing? must you not have been convincing? must he not have been convincing? must we not have been convincing? must you not have been convincing? must they not have been convincing?