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 mustn't convince you mustn't convince he mustn't convince we mustn't convince you mustn't convince they mustn't convince
V-ing form
I mustn't be convincing you mustn't be convincing he mustn't be convincing we mustn't be convincing you mustn't be convincing they mustn't be convincing
Perfect
I mustn't have convinced you mustn't have convinced he mustn't have convinced we mustn't have convinced you mustn't have convinced they mustn't have convinced
V-ing perfect
I mustn't have been convincing you mustn't have been convincing he mustn't have been convincing we mustn't have been convincing you mustn't have been convincing they mustn't 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
mustn't I convince? mustn't you convince? mustn't he convince? mustn't we convince? mustn't you convince? mustn't they convince?
V-ing form
mustn't I be convincing? mustn't you be convincing? mustn't he be convincing? mustn't we be convincing? mustn't you be convincing? mustn't they be convincing?
Perfect
mustn't I have convinced? mustn't you have convinced? mustn't he have convinced? mustn't we have convinced? mustn't you have convinced? mustn't they have convinced?
V-ing perfect
mustn't I have been convincing? mustn't you have been convincing? mustn't he have been convincing? mustn't we have been convincing? mustn't you have been convincing? mustn't they have been convincing?