could cumulate
Regular verb: cumulate - cumulated- cumulated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could cumulate
you could cumulate
she could cumulate
we could cumulate
you could cumulate
they could cumulate 	I could be cumulating
you could be cumulating
she could be cumulating
we could be cumulating
you could be cumulating
they could be cumulating	I could have cumulated
you could have cumulated
she could have cumulated
we could have cumulated
you could have cumulated
they could have cumulated	I could have been cumulating
you could have been cumulating
she could have been cumulating
we could have been cumulating
you could have been cumulating
they could have been cumulating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't cumulate
you couldn't cumulate
she couldn't cumulate
we couldn't cumulate
you couldn't cumulate
they couldn't cumulate 	I couldn't be cumulating
you couldn't be cumulating
she couldn't be cumulating
we couldn't be cumulating
you couldn't be cumulating
they couldn't be cumulating	I couldn't have cumulated
you couldn't have cumulated
she couldn't have cumulated
we couldn't have cumulated
you couldn't have cumulated
they couldn't have cumulated	I couldn't have been cumulating
you couldn't have been cumulating
she couldn't have been cumulating
we couldn't have been cumulating
you couldn't have been cumulating
they couldn't have been cumulating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I cumulate?
could you cumulate?
could she cumulate?
could we cumulate?
could you cumulate?
could they cumulate? 	could I be cumulating?
could you be cumulating?
could she be cumulating?
could we be cumulating?
could you be cumulating?
could they be cumulating? 	could I have cumulated?
could you have cumulated?
could she have cumulated?
could we have cumulated?
could you have cumulated?
could they have cumulated? 	could I have been cumulating?
could you have been cumulating?
could she have been cumulating?
could we have been cumulating?
could you have been cumulating?
could they have been cumulating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I cumulate?
couldn't you cumulate?
couldn't she cumulate?
couldn't we cumulate?
couldn't you cumulate?
couldn't they cumulate? 	couldn't I be cumulating?
couldn't you be cumulating?
couldn't she be cumulating?
couldn't we be cumulating?
couldn't you be cumulating?
couldn't they be cumulating? 	couldn't I have cumulated?
couldn't you have cumulated?
couldn't she have cumulated?
couldn't we have cumulated?
couldn't you have cumulated?
couldn't they have cumulated? 	couldn't I have been cumulating?
couldn't you have been cumulating?
couldn't she have been cumulating?
couldn't we have been cumulating?
couldn't you have been cumulating?
couldn't they have been cumulating?