may retrograde
Regular verb: retrograde - retrograded- retrograded

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may retrograde
you may retrograde
she may retrograde
we may retrograde
you may retrograde
they may retrograde 	I may be retrograding
you may be retrograding
she may be retrograding
we may be retrograding
you may be retrograding
they may be retrograding	I may have retrograded
you may have retrograded
she may have retrograded
we may have retrograded
you may have retrograded
they may have retrograded	I may have been retrograding
you may have been retrograding
she may have been retrograding
we may have been retrograding
you may have been retrograding
they may have been retrograding	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't retrograde
you mayn't retrograde
she mayn't retrograde
we mayn't retrograde
you mayn't retrograde
they mayn't retrograde 	I mayn't be retrograding
you mayn't be retrograding
she mayn't be retrograding
we mayn't be retrograding
you mayn't be retrograding
they mayn't be retrograding	I mayn't have retrograded
you mayn't have retrograded
she mayn't have retrograded
we mayn't have retrograded
you mayn't have retrograded
they mayn't have retrograded	I mayn't have been retrograding
you mayn't have been retrograding
she mayn't have been retrograding
we mayn't have been retrograding
you mayn't have been retrograding
they mayn't have been retrograding	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I retrograde?
may you retrograde?
may she retrograde?
may we retrograde?
may you retrograde?
may they retrograde? 	may I be retrograding?
may you be retrograding?
may she be retrograding?
may we be retrograding?
may you be retrograding?
may they be retrograding? 	may I have retrograded?
may you have retrograded?
may she have retrograded?
may we have retrograded?
may you have retrograded?
may they have retrograded? 	may I have been retrograding?
may you have been retrograding?
may she have been retrograding?
may we have been retrograding?
may you have been retrograding?
may they have been retrograding? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I retrograde?
mayn't you retrograde?
mayn't she retrograde?
mayn't we retrograde?
mayn't you retrograde?
mayn't they retrograde? 	mayn't I be retrograding?
mayn't you be retrograding?
mayn't she be retrograding?
mayn't we be retrograding?
mayn't you be retrograding?
mayn't they be retrograding? 	mayn't I have retrograded?
mayn't you have retrograded?
mayn't she have retrograded?
mayn't we have retrograded?
mayn't you have retrograded?
mayn't they have retrograded? 	mayn't I have been retrograding?
mayn't you have been retrograding?
mayn't she have been retrograding?
mayn't we have been retrograding?
mayn't you have been retrograding?
mayn't they have been retrograding?