could aggregate
Regular verb: aggregate - aggregated- aggregated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could aggregate
you could aggregate
he could aggregate
we could aggregate
you could aggregate
they could aggregate 	I could be aggregating
you could be aggregating
he could be aggregating
we could be aggregating
you could be aggregating
they could be aggregating	I could have aggregated
you could have aggregated
he could have aggregated
we could have aggregated
you could have aggregated
they could have aggregated	I could have been aggregating
you could have been aggregating
he could have been aggregating
we could have been aggregating
you could have been aggregating
they could have been aggregating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not aggregate
you could not aggregate
he could not aggregate
we could not aggregate
you could not aggregate
they could not aggregate 	I could not be aggregating
you could not be aggregating
he could not be aggregating
we could not be aggregating
you could not be aggregating
they could not be aggregating	I could not have aggregated
you could not have aggregated
he could not have aggregated
we could not have aggregated
you could not have aggregated
they could not have aggregated	I could not have been aggregating
you could not have been aggregating
he could not have been aggregating
we could not have been aggregating
you could not have been aggregating
they could not have been aggregating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I aggregate?
could you aggregate?
could he aggregate?
could we aggregate?
could you aggregate?
could they aggregate? 	could I be aggregating?
could you be aggregating?
could he be aggregating?
could we be aggregating?
could you be aggregating?
could they be aggregating? 	could I have aggregated?
could you have aggregated?
could he have aggregated?
could we have aggregated?
could you have aggregated?
could they have aggregated? 	could I have been aggregating?
could you have been aggregating?
could he have been aggregating?
could we have been aggregating?
could you have been aggregating?
could they have been aggregating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not aggregate?
could you not aggregate?
could he not aggregate?
could we not aggregate?
could you not aggregate?
could they not aggregate? 	could I not be aggregating?
could you not be aggregating?
could he not be aggregating?
could we not be aggregating?
could you not be aggregating?
could they not be aggregating? 	could I not have aggregated?
could you not have aggregated?
could he not have aggregated?
could we not have aggregated?
could you not have aggregated?
could they not have aggregated? 	could I not have been aggregating?
could you not have been aggregating?
could he not have been aggregating?
could we not have been aggregating?
could you not have been aggregating?
could they not have been aggregating?