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