must cumulate
Regular verb: cumulate - cumulated- cumulated

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

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

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

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