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