I must prepossess you must prepossess she must prepossess we must prepossess you must prepossess they must prepossess
V-ing form
I must be prepossessing you must be prepossessing she must be prepossessing we must be prepossessing you must be prepossessing they must be prepossessing
Perfect
I must have prepossessed you must have prepossessed she must have prepossessed we must have prepossessed you must have prepossessed they must have prepossessed
V-ing perfect
I must have been prepossessing you must have been prepossessing she must have been prepossessing we must have been prepossessing you must have been prepossessing they must have been prepossessing
Negation
Simple form
I mustn't prepossess you mustn't prepossess she mustn't prepossess we mustn't prepossess you mustn't prepossess they mustn't prepossess
V-ing form
I mustn't be prepossessing you mustn't be prepossessing she mustn't be prepossessing we mustn't be prepossessing you mustn't be prepossessing they mustn't be prepossessing
Perfect
I mustn't have prepossessed you mustn't have prepossessed she mustn't have prepossessed we mustn't have prepossessed you mustn't have prepossessed they mustn't have prepossessed
V-ing perfect
I mustn't have been prepossessing you mustn't have been prepossessing she mustn't have been prepossessing we mustn't have been prepossessing you mustn't have been prepossessing they mustn't have been prepossessing
Interrogative form
Simple form
must I prepossess? must you prepossess? must she prepossess? must we prepossess? must you prepossess? must they prepossess?
V-ing form
must I be prepossessing? must you be prepossessing? must she be prepossessing? must we be prepossessing? must you be prepossessing? must they be prepossessing?
Perfect
must I have prepossessed? must you have prepossessed? must she have prepossessed? must we have prepossessed? must you have prepossessed? must they have prepossessed?
V-ing perfect
must I have been prepossessing? must you have been prepossessing? must she have been prepossessing? must we have been prepossessing? must you have been prepossessing? must they have been prepossessing?
Interro-negative form
Simple form
mustn't I prepossess? mustn't you prepossess? mustn't she prepossess? mustn't we prepossess? mustn't you prepossess? mustn't they prepossess?
V-ing form
mustn't I be prepossessing? mustn't you be prepossessing? mustn't she be prepossessing? mustn't we be prepossessing? mustn't you be prepossessing? mustn't they be prepossessing?
Perfect
mustn't I have prepossessed? mustn't you have prepossessed? mustn't she have prepossessed? mustn't we have prepossessed? mustn't you have prepossessed? mustn't they have prepossessed?
V-ing perfect
mustn't I have been prepossessing? mustn't you have been prepossessing? mustn't she have been prepossessing? mustn't we have been prepossessing? mustn't you have been prepossessing? mustn't they have been prepossessing?