may undeceive
Regular verb: undeceive - undeceived- undeceived

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may undeceive
you may undeceive
she may undeceive
we may undeceive
you may undeceive
they may undeceive 	I may be undeceiving
you may be undeceiving
she may be undeceiving
we may be undeceiving
you may be undeceiving
they may be undeceiving	I may have undeceived
you may have undeceived
she may have undeceived
we may have undeceived
you may have undeceived
they may have undeceived	I may have been undeceiving
you may have been undeceiving
she may have been undeceiving
we may have been undeceiving
you may have been undeceiving
they may have been undeceiving	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't undeceive
you mayn't undeceive
she mayn't undeceive
we mayn't undeceive
you mayn't undeceive
they mayn't undeceive 	I mayn't be undeceiving
you mayn't be undeceiving
she mayn't be undeceiving
we mayn't be undeceiving
you mayn't be undeceiving
they mayn't be undeceiving	I mayn't have undeceived
you mayn't have undeceived
she mayn't have undeceived
we mayn't have undeceived
you mayn't have undeceived
they mayn't have undeceived	I mayn't have been undeceiving
you mayn't have been undeceiving
she mayn't have been undeceiving
we mayn't have been undeceiving
you mayn't have been undeceiving
they mayn't have been undeceiving	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I undeceive?
may you undeceive?
may she undeceive?
may we undeceive?
may you undeceive?
may they undeceive? 	may I be undeceiving?
may you be undeceiving?
may she be undeceiving?
may we be undeceiving?
may you be undeceiving?
may they be undeceiving? 	may I have undeceived?
may you have undeceived?
may she have undeceived?
may we have undeceived?
may you have undeceived?
may they have undeceived? 	may I have been undeceiving?
may you have been undeceiving?
may she have been undeceiving?
may we have been undeceiving?
may you have been undeceiving?
may they have been undeceiving? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I undeceive?
mayn't you undeceive?
mayn't she undeceive?
mayn't we undeceive?
mayn't you undeceive?
mayn't they undeceive? 	mayn't I be undeceiving?
mayn't you be undeceiving?
mayn't she be undeceiving?
mayn't we be undeceiving?
mayn't you be undeceiving?
mayn't they be undeceiving? 	mayn't I have undeceived?
mayn't you have undeceived?
mayn't she have undeceived?
mayn't we have undeceived?
mayn't you have undeceived?
mayn't they have undeceived? 	mayn't I have been undeceiving?
mayn't you have been undeceiving?
mayn't she have been undeceiving?
mayn't we have been undeceiving?
mayn't you have been undeceiving?
mayn't they have been undeceiving?