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