I may screech you may screech he may screech we may screech you may screech they may screech
Forme en V-ing
I may be screeching you may be screeching he may be screeching we may be screeching you may be screeching they may be screeching
Perfect
I may have screeched you may have screeched he may have screeched we may have screeched you may have screeched they may have screeched
Perfect en V-ing
I may have been screeching you may have been screeching he may have been screeching we may have been screeching you may have been screeching they may have been screeching
Négation
Forme simple
I mayn't screech you mayn't screech he mayn't screech we mayn't screech you mayn't screech they mayn't screech
Forme en V-ing
I mayn't be screeching you mayn't be screeching he mayn't be screeching we mayn't be screeching you mayn't be screeching they mayn't be screeching
Perfect
I mayn't have screeched you mayn't have screeched he mayn't have screeched we mayn't have screeched you mayn't have screeched they mayn't have screeched
Perfect en V-ing
I mayn't have been screeching you mayn't have been screeching he mayn't have been screeching we mayn't have been screeching you mayn't have been screeching they mayn't have been screeching
Forme interrogative
Forme simple
may I screech? may you screech? may he screech? may we screech? may you screech? may they screech?
Forme en V-ing
may I be screeching? may you be screeching? may he be screeching? may we be screeching? may you be screeching? may they be screeching?
Perfect
may I have screeched? may you have screeched? may he have screeched? may we have screeched? may you have screeched? may they have screeched?
Perfect en V-ing
may I have been screeching? may you have been screeching? may he have been screeching? may we have been screeching? may you have been screeching? may they have been screeching?
Forme interro-négative
Forme simple
mayn't I screech? mayn't you screech? mayn't he screech? mayn't we screech? mayn't you screech? mayn't they screech?
Forme en V-ing
mayn't I be screeching? mayn't you be screeching? mayn't he be screeching? mayn't we be screeching? mayn't you be screeching? mayn't they be screeching?
Perfect
mayn't I have screeched? mayn't you have screeched? mayn't he have screeched? mayn't we have screeched? mayn't you have screeched? mayn't they have screeched?
Perfect en V-ing
mayn't I have been screeching? mayn't you have been screeching? mayn't he have been screeching? mayn't we have been screeching? mayn't you have been screeching? mayn't they have been screeching?