can congratulate
Regular verb: congratulate - congratulated- congratulated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can congratulate
you can congratulate
she can congratulate
we can congratulate
you can congratulate
they can congratulate 	I can be congratulating
you can be congratulating
she can be congratulating
we can be congratulating
you can be congratulating
they can be congratulating	I can have congratulated
you can have congratulated
she can have congratulated
we can have congratulated
you can have congratulated
they can have congratulated	I can have been congratulating
you can have been congratulating
she can have been congratulating
we can have been congratulating
you can have been congratulating
they can have been congratulating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't congratulate
you can't congratulate
she can't congratulate
we can't congratulate
you can't congratulate
they can't congratulate 	I can't be congratulating
you can't be congratulating
she can't be congratulating
we can't be congratulating
you can't be congratulating
they can't be congratulating	I can't have congratulated
you can't have congratulated
she can't have congratulated
we can't have congratulated
you can't have congratulated
they can't have congratulated	I can't have been congratulating
you can't have been congratulating
she can't have been congratulating
we can't have been congratulating
you can't have been congratulating
they can't have been congratulating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I congratulate?
can you congratulate?
can she congratulate?
can we congratulate?
can you congratulate?
can they congratulate? 	can I be congratulating?
can you be congratulating?
can she be congratulating?
can we be congratulating?
can you be congratulating?
can they be congratulating? 	can I have congratulated?
can you have congratulated?
can she have congratulated?
can we have congratulated?
can you have congratulated?
can they have congratulated? 	can I have been congratulating?
can you have been congratulating?
can she have been congratulating?
can we have been congratulating?
can you have been congratulating?
can they have been congratulating? 	

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