may undertake
Irregular verb: undertake - undertook- undertaken

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may undertake
you may undertake
she may undertake
we may undertake
you may undertake
they may undertake 	I may be undertaking
you may be undertaking
she may be undertaking
we may be undertaking
you may be undertaking
they may be undertaking	I may have undertaken
you may have undertaken
she may have undertaken
we may have undertaken
you may have undertaken
they may have undertaken	I may have been undertaking
you may have been undertaking
she may have been undertaking
we may have been undertaking
you may have been undertaking
they may have been undertaking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't undertake
you mayn't undertake
she mayn't undertake
we mayn't undertake
you mayn't undertake
they mayn't undertake 	I mayn't be undertaking
you mayn't be undertaking
she mayn't be undertaking
we mayn't be undertaking
you mayn't be undertaking
they mayn't be undertaking	I mayn't have undertaken
you mayn't have undertaken
she mayn't have undertaken
we mayn't have undertaken
you mayn't have undertaken
they mayn't have undertaken	I mayn't have been undertaking
you mayn't have been undertaking
she mayn't have been undertaking
we mayn't have been undertaking
you mayn't have been undertaking
they mayn't have been undertaking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I undertake?
may you undertake?
may she undertake?
may we undertake?
may you undertake?
may they undertake? 	may I be undertaking?
may you be undertaking?
may she be undertaking?
may we be undertaking?
may you be undertaking?
may they be undertaking? 	may I have undertaken?
may you have undertaken?
may she have undertaken?
may we have undertaken?
may you have undertaken?
may they have undertaken? 	may I have been undertaking?
may you have been undertaking?
may she have been undertaking?
may we have been undertaking?
may you have been undertaking?
may they have been undertaking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I undertake?
mayn't you undertake?
mayn't she undertake?
mayn't we undertake?
mayn't you undertake?
mayn't they undertake? 	mayn't I be undertaking?
mayn't you be undertaking?
mayn't she be undertaking?
mayn't we be undertaking?
mayn't you be undertaking?
mayn't they be undertaking? 	mayn't I have undertaken?
mayn't you have undertaken?
mayn't she have undertaken?
mayn't we have undertaken?
mayn't you have undertaken?
mayn't they have undertaken? 	mayn't I have been undertaking?
mayn't you have been undertaking?
mayn't she have been undertaking?
mayn't we have been undertaking?
mayn't you have been undertaking?
mayn't they have been undertaking?