may undermine
Regular verb: undermine - undermined- undermined

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may undermine
you may undermine
she may undermine
we may undermine
you may undermine
they may undermine 	I may be undermining
you may be undermining
she may be undermining
we may be undermining
you may be undermining
they may be undermining	I may have undermined
you may have undermined
she may have undermined
we may have undermined
you may have undermined
they may have undermined	I may have been undermining
you may have been undermining
she may have been undermining
we may have been undermining
you may have been undermining
they may have been undermining	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't undermine
you mayn't undermine
she mayn't undermine
we mayn't undermine
you mayn't undermine
they mayn't undermine 	I mayn't be undermining
you mayn't be undermining
she mayn't be undermining
we mayn't be undermining
you mayn't be undermining
they mayn't be undermining	I mayn't have undermined
you mayn't have undermined
she mayn't have undermined
we mayn't have undermined
you mayn't have undermined
they mayn't have undermined	I mayn't have been undermining
you mayn't have been undermining
she mayn't have been undermining
we mayn't have been undermining
you mayn't have been undermining
they mayn't have been undermining	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I undermine?
may you undermine?
may she undermine?
may we undermine?
may you undermine?
may they undermine? 	may I be undermining?
may you be undermining?
may she be undermining?
may we be undermining?
may you be undermining?
may they be undermining? 	may I have undermined?
may you have undermined?
may she have undermined?
may we have undermined?
may you have undermined?
may they have undermined? 	may I have been undermining?
may you have been undermining?
may she have been undermining?
may we have been undermining?
may you have been undermining?
may they have been undermining? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I undermine?
mayn't you undermine?
mayn't she undermine?
mayn't we undermine?
mayn't you undermine?
mayn't they undermine? 	mayn't I be undermining?
mayn't you be undermining?
mayn't she be undermining?
mayn't we be undermining?
mayn't you be undermining?
mayn't they be undermining? 	mayn't I have undermined?
mayn't you have undermined?
mayn't she have undermined?
mayn't we have undermined?
mayn't you have undermined?
mayn't they have undermined? 	mayn't I have been undermining?
mayn't you have been undermining?
mayn't she have been undermining?
mayn't we have been undermining?
mayn't you have been undermining?
mayn't they have been undermining?