could convene
Regular verb: convene - convened- convened

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could convene
you could convene
he could convene
we could convene
you could convene
they could convene 	I could be convening
you could be convening
he could be convening
we could be convening
you could be convening
they could be convening	I could have convened
you could have convened
he could have convened
we could have convened
you could have convened
they could have convened	I could have been convening
you could have been convening
he could have been convening
we could have been convening
you could have been convening
they could have been convening	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not convene
you could not convene
he could not convene
we could not convene
you could not convene
they could not convene 	I could not be convening
you could not be convening
he could not be convening
we could not be convening
you could not be convening
they could not be convening	I could not have convened
you could not have convened
he could not have convened
we could not have convened
you could not have convened
they could not have convened	I could not have been convening
you could not have been convening
he could not have been convening
we could not have been convening
you could not have been convening
they could not have been convening	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I convene?
could you convene?
could he convene?
could we convene?
could you convene?
could they convene? 	could I be convening?
could you be convening?
could he be convening?
could we be convening?
could you be convening?
could they be convening? 	could I have convened?
could you have convened?
could he have convened?
could we have convened?
could you have convened?
could they have convened? 	could I have been convening?
could you have been convening?
could he have been convening?
could we have been convening?
could you have been convening?
could they have been convening? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not convene?
could you not convene?
could he not convene?
could we not convene?
could you not convene?
could they not convene? 	could I not be convening?
could you not be convening?
could he not be convening?
could we not be convening?
could you not be convening?
could they not be convening? 	could I not have convened?
could you not have convened?
could he not have convened?
could we not have convened?
could you not have convened?
could they not have convened? 	could I not have been convening?
could you not have been convening?
could he not have been convening?
could we not have been convening?
could you not have been convening?
could they not have been convening?