may invest
Regular verb: invest - invested- invested

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may invest
you may invest
she may invest
we may invest
you may invest
they may invest 	I may be investing
you may be investing
she may be investing
we may be investing
you may be investing
they may be investing	I may have invested
you may have invested
she may have invested
we may have invested
you may have invested
they may have invested	I may have been investing
you may have been investing
she may have been investing
we may have been investing
you may have been investing
they may have been investing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't invest
you mayn't invest
she mayn't invest
we mayn't invest
you mayn't invest
they mayn't invest 	I mayn't be investing
you mayn't be investing
she mayn't be investing
we mayn't be investing
you mayn't be investing
they mayn't be investing	I mayn't have invested
you mayn't have invested
she mayn't have invested
we mayn't have invested
you mayn't have invested
they mayn't have invested	I mayn't have been investing
you mayn't have been investing
she mayn't have been investing
we mayn't have been investing
you mayn't have been investing
they mayn't have been investing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I invest?
may you invest?
may she invest?
may we invest?
may you invest?
may they invest? 	may I be investing?
may you be investing?
may she be investing?
may we be investing?
may you be investing?
may they be investing? 	may I have invested?
may you have invested?
may she have invested?
may we have invested?
may you have invested?
may they have invested? 	may I have been investing?
may you have been investing?
may she have been investing?
may we have been investing?
may you have been investing?
may they have been investing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I invest?
mayn't you invest?
mayn't she invest?
mayn't we invest?
mayn't you invest?
mayn't they invest? 	mayn't I be investing?
mayn't you be investing?
mayn't she be investing?
mayn't we be investing?
mayn't you be investing?
mayn't they be investing? 	mayn't I have invested?
mayn't you have invested?
mayn't she have invested?
mayn't we have invested?
mayn't you have invested?
mayn't they have invested? 	mayn't I have been investing?
mayn't you have been investing?
mayn't she have been investing?
mayn't we have been investing?
mayn't you have been investing?
mayn't they have been investing?