must congratulate
Regular verb: congratulate - congratulated- congratulated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
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? 	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 	Perfect 	V-ing perfect 	
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? 	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?