English verb conjugation
MUST CONGRATULATE

Regular verb: congratulate - congratulated - congratulated

Affirmation

Simple form	V-ing form
I must congratulate you must congratulate she must congratulate we must congratulate you must congratulate they must congratulate	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	V-ing 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	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	V-ing 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	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	V-ing 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	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	V-ing form
must I congratulate? must you congratulate? must she congratulate? must we congratulate? must you congratulate? must they congratulate?	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	V-ing 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?	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	V-ing 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?	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	V-ing 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?	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?