English verb conjugation
MUST CONGRATULATE

Regular verb: congratulate - congratulated - congratulated

Affirmation

Simple form	V-ing form
I must congratulate you must congratulate he must congratulate we must congratulate you must congratulate they must congratulate	I must be congratulating you must be congratulating he must be congratulating we must be congratulating you must be congratulating they must be congratulating
Perfect	V-ing perfect
I must have congratulated you must have congratulated he must have congratulated we must have congratulated you must have congratulated they must have congratulated	I must have been congratulating you must have been congratulating he must have been congratulating we must have been congratulating you must have been congratulating they must have been congratulating

Negation

Simple form	V-ing form
I mustn't congratulate you mustn't congratulate he mustn't congratulate we mustn't congratulate you mustn't congratulate they mustn't congratulate	I mustn't be congratulating you mustn't be congratulating he mustn't be congratulating we mustn't be congratulating you mustn't be congratulating they mustn't be congratulating
Perfect	V-ing perfect
I mustn't have congratulated you mustn't have congratulated he mustn't have congratulated we mustn't have congratulated you mustn't have congratulated they mustn't have congratulated	I mustn't have been congratulating you mustn't have been congratulating he 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	V-ing form
must I congratulate? must you congratulate? must he congratulate? must we congratulate? must you congratulate? must they congratulate?	must I be congratulating? must you be congratulating? must he be congratulating? must we be congratulating? must you be congratulating? must they be congratulating?
Perfect	V-ing perfect
must I have congratulated? must you have congratulated? must he have congratulated? must we have congratulated? must you have congratulated? must they have congratulated?	must I have been congratulating? must you have been congratulating? must he have been congratulating? must we have been congratulating? must you have been congratulating? must they have been congratulating?

Interro-negative form

Simple form	V-ing form
mustn't I congratulate? mustn't you congratulate? mustn't he congratulate? mustn't we congratulate? mustn't you congratulate? mustn't they congratulate?	mustn't I be congratulating? mustn't you be congratulating? mustn't he be congratulating? mustn't we be congratulating? mustn't you be congratulating? mustn't they be congratulating?
Perfect	V-ing perfect
mustn't I have congratulated? mustn't you have congratulated? mustn't he have congratulated? mustn't we have congratulated? mustn't you have congratulated? mustn't they have congratulated?	mustn't I have been congratulating? mustn't you have been congratulating? mustn't he have been congratulating? mustn't we have been congratulating? mustn't you have been congratulating? mustn't they have been congratulating?