I may tremble you may tremble he may tremble we may tremble you may tremble they may tremble
V-ing form
I may be trembling you may be trembling he may be trembling we may be trembling you may be trembling they may be trembling
Perfect
I may have trembled you may have trembled he may have trembled we may have trembled you may have trembled they may have trembled
V-ing perfect
I may have been trembling you may have been trembling he may have been trembling we may have been trembling you may have been trembling they may have been trembling
Negation
Simple form
I mayn't tremble you mayn't tremble he mayn't tremble we mayn't tremble you mayn't tremble they mayn't tremble
V-ing form
I mayn't be trembling you mayn't be trembling he mayn't be trembling we mayn't be trembling you mayn't be trembling they mayn't be trembling
Perfect
I mayn't have trembled you mayn't have trembled he mayn't have trembled we mayn't have trembled you mayn't have trembled they mayn't have trembled
V-ing perfect
I mayn't have been trembling you mayn't have been trembling he mayn't have been trembling we mayn't have been trembling you mayn't have been trembling they mayn't have been trembling
Interrogative form
Simple form
may I tremble? may you tremble? may he tremble? may we tremble? may you tremble? may they tremble?
V-ing form
may I be trembling? may you be trembling? may he be trembling? may we be trembling? may you be trembling? may they be trembling?
Perfect
may I have trembled? may you have trembled? may he have trembled? may we have trembled? may you have trembled? may they have trembled?
V-ing perfect
may I have been trembling? may you have been trembling? may he have been trembling? may we have been trembling? may you have been trembling? may they have been trembling?
Interro-negative form
Simple form
mayn't I tremble? mayn't you tremble? mayn't he tremble? mayn't we tremble? mayn't you tremble? mayn't they tremble?
V-ing form
mayn't I be trembling? mayn't you be trembling? mayn't he be trembling? mayn't we be trembling? mayn't you be trembling? mayn't they be trembling?
Perfect
mayn't I have trembled? mayn't you have trembled? mayn't he have trembled? mayn't we have trembled? mayn't you have trembled? mayn't they have trembled?
V-ing perfect
mayn't I have been trembling? mayn't you have been trembling? mayn't he have been trembling? mayn't we have been trembling? mayn't you have been trembling? mayn't they have been trembling?