may cumulate
Regular verb: cumulate - cumulated- cumulated

Affirmation 	
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I may cumulate
you may cumulate
she may cumulate
we may cumulate
you may cumulate
they may cumulate 	I may be cumulating
you may be cumulating
she may be cumulating
we may be cumulating
you may be cumulating
they may be cumulating	I may have cumulated
you may have cumulated
she may have cumulated
we may have cumulated
you may have cumulated
they may have cumulated	I may have been cumulating
you may have been cumulating
she may have been cumulating
we may have been cumulating
you may have been cumulating
they may have been cumulating	

Negation 	
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I mayn't cumulate
you mayn't cumulate
she mayn't cumulate
we mayn't cumulate
you mayn't cumulate
they mayn't cumulate 	I mayn't be cumulating
you mayn't be cumulating
she mayn't be cumulating
we mayn't be cumulating
you mayn't be cumulating
they mayn't be cumulating	I mayn't have cumulated
you mayn't have cumulated
she mayn't have cumulated
we mayn't have cumulated
you mayn't have cumulated
they mayn't have cumulated	I mayn't have been cumulating
you mayn't have been cumulating
she mayn't have been cumulating
we mayn't have been cumulating
you mayn't have been cumulating
they mayn't have been cumulating	

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

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