could gratulate
Verbe régulier : gratulate - gratulated- gratulated

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could gratulate
you could gratulate
he could gratulate
we could gratulate
you could gratulate
they could gratulate 	I could be gratulating
you could be gratulating
he could be gratulating
we could be gratulating
you could be gratulating
they could be gratulating	I could have gratulated
you could have gratulated
he could have gratulated
we could have gratulated
you could have gratulated
they could have gratulated	I could have been gratulating
you could have been gratulating
he could have been gratulating
we could have been gratulating
you could have been gratulating
they could have been gratulating	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could not gratulate
you could not gratulate
he could not gratulate
we could not gratulate
you could not gratulate
they could not gratulate 	I could not be gratulating
you could not be gratulating
he could not be gratulating
we could not be gratulating
you could not be gratulating
they could not be gratulating	I could not have gratulated
you could not have gratulated
he could not have gratulated
we could not have gratulated
you could not have gratulated
they could not have gratulated	I could not have been gratulating
you could not have been gratulating
he could not have been gratulating
we could not have been gratulating
you could not have been gratulating
they could not have been gratulating	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I gratulate?
could you gratulate?
could he gratulate?
could we gratulate?
could you gratulate?
could they gratulate? 	could I be gratulating?
could you be gratulating?
could he be gratulating?
could we be gratulating?
could you be gratulating?
could they be gratulating? 	could I have gratulated?
could you have gratulated?
could he have gratulated?
could we have gratulated?
could you have gratulated?
could they have gratulated? 	could I have been gratulating?
could you have been gratulating?
could he have been gratulating?
could we have been gratulating?
could you have been gratulating?
could they have been gratulating? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I not gratulate?
could you not gratulate?
could he not gratulate?
could we not gratulate?
could you not gratulate?
could they not gratulate? 	could I not be gratulating?
could you not be gratulating?
could he not be gratulating?
could we not be gratulating?
could you not be gratulating?
could they not be gratulating? 	could I not have gratulated?
could you not have gratulated?
could he not have gratulated?
could we not have gratulated?
could you not have gratulated?
could they not have gratulated? 	could I not have been gratulating?
could you not have been gratulating?
could he not have been gratulating?
could we not have been gratulating?
could you not have been gratulating?
could they not have been gratulating?