may undertain
Regular verb: undertain - undertained- undertained

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may undertain
you may undertain
she may undertain
we may undertain
you may undertain
they may undertain 	I may be undertaining
you may be undertaining
she may be undertaining
we may be undertaining
you may be undertaining
they may be undertaining	I may have undertained
you may have undertained
she may have undertained
we may have undertained
you may have undertained
they may have undertained	I may have been undertaining
you may have been undertaining
she may have been undertaining
we may have been undertaining
you may have been undertaining
they may have been undertaining	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't undertain
you mayn't undertain
she mayn't undertain
we mayn't undertain
you mayn't undertain
they mayn't undertain 	I mayn't be undertaining
you mayn't be undertaining
she mayn't be undertaining
we mayn't be undertaining
you mayn't be undertaining
they mayn't be undertaining	I mayn't have undertained
you mayn't have undertained
she mayn't have undertained
we mayn't have undertained
you mayn't have undertained
they mayn't have undertained	I mayn't have been undertaining
you mayn't have been undertaining
she mayn't have been undertaining
we mayn't have been undertaining
you mayn't have been undertaining
they mayn't have been undertaining	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I undertain?
may you undertain?
may she undertain?
may we undertain?
may you undertain?
may they undertain? 	may I be undertaining?
may you be undertaining?
may she be undertaining?
may we be undertaining?
may you be undertaining?
may they be undertaining? 	may I have undertained?
may you have undertained?
may she have undertained?
may we have undertained?
may you have undertained?
may they have undertained? 	may I have been undertaining?
may you have been undertaining?
may she have been undertaining?
may we have been undertaining?
may you have been undertaining?
may they have been undertaining? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I undertain?
mayn't you undertain?
mayn't she undertain?
mayn't we undertain?
mayn't you undertain?
mayn't they undertain? 	mayn't I be undertaining?
mayn't you be undertaining?
mayn't she be undertaining?
mayn't we be undertaining?
mayn't you be undertaining?
mayn't they be undertaining? 	mayn't I have undertained?
mayn't you have undertained?
mayn't she have undertained?
mayn't we have undertained?
mayn't you have undertained?
mayn't they have undertained? 	mayn't I have been undertaining?
mayn't you have been undertaining?
mayn't she have been undertaining?
mayn't we have been undertaining?
mayn't you have been undertaining?
mayn't they have been undertaining?