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