may modulate
Regular verb: modulate - modulated- modulated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may modulate
you may modulate
she may modulate
we may modulate
you may modulate
they may modulate 	I may be modulating
you may be modulating
she may be modulating
we may be modulating
you may be modulating
they may be modulating	I may have modulated
you may have modulated
she may have modulated
we may have modulated
you may have modulated
they may have modulated	I may have been modulating
you may have been modulating
she may have been modulating
we may have been modulating
you may have been modulating
they may have been modulating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't modulate
you mayn't modulate
she mayn't modulate
we mayn't modulate
you mayn't modulate
they mayn't modulate 	I mayn't be modulating
you mayn't be modulating
she mayn't be modulating
we mayn't be modulating
you mayn't be modulating
they mayn't be modulating	I mayn't have modulated
you mayn't have modulated
she mayn't have modulated
we mayn't have modulated
you mayn't have modulated
they mayn't have modulated	I mayn't have been modulating
you mayn't have been modulating
she mayn't have been modulating
we mayn't have been modulating
you mayn't have been modulating
they mayn't have been modulating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I modulate?
may you modulate?
may she modulate?
may we modulate?
may you modulate?
may they modulate? 	may I be modulating?
may you be modulating?
may she be modulating?
may we be modulating?
may you be modulating?
may they be modulating? 	may I have modulated?
may you have modulated?
may she have modulated?
may we have modulated?
may you have modulated?
may they have modulated? 	may I have been modulating?
may you have been modulating?
may she have been modulating?
may we have been modulating?
may you have been modulating?
may they have been modulating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I modulate?
mayn't you modulate?
mayn't she modulate?
mayn't we modulate?
mayn't you modulate?
mayn't they modulate? 	mayn't I be modulating?
mayn't you be modulating?
mayn't she be modulating?
mayn't we be modulating?
mayn't you be modulating?
mayn't they be modulating? 	mayn't I have modulated?
mayn't you have modulated?
mayn't she have modulated?
mayn't we have modulated?
mayn't you have modulated?
mayn't they have modulated? 	mayn't I have been modulating?
mayn't you have been modulating?
mayn't she have been modulating?
mayn't we have been modulating?
mayn't you have been modulating?
mayn't they have been modulating?