I may succumb you may succumb she may succumb we may succumb you may succumb they may succumb
V-ing form
I may be succumbing you may be succumbing she may be succumbing we may be succumbing you may be succumbing they may be succumbing
Perfect
I may have succumbed you may have succumbed she may have succumbed we may have succumbed you may have succumbed they may have succumbed
V-ing perfect
I may have been succumbing you may have been succumbing she may have been succumbing we may have been succumbing you may have been succumbing they may have been succumbing
Negation
Simple form
I mayn't succumb you mayn't succumb she mayn't succumb we mayn't succumb you mayn't succumb they mayn't succumb
V-ing form
I mayn't be succumbing you mayn't be succumbing she mayn't be succumbing we mayn't be succumbing you mayn't be succumbing they mayn't be succumbing
Perfect
I mayn't have succumbed you mayn't have succumbed she mayn't have succumbed we mayn't have succumbed you mayn't have succumbed they mayn't have succumbed
V-ing perfect
I mayn't have been succumbing you mayn't have been succumbing she mayn't have been succumbing we mayn't have been succumbing you mayn't have been succumbing they mayn't have been succumbing
Interrogative form
Simple form
may I succumb? may you succumb? may she succumb? may we succumb? may you succumb? may they succumb?
V-ing form
may I be succumbing? may you be succumbing? may she be succumbing? may we be succumbing? may you be succumbing? may they be succumbing?
Perfect
may I have succumbed? may you have succumbed? may she have succumbed? may we have succumbed? may you have succumbed? may they have succumbed?
V-ing perfect
may I have been succumbing? may you have been succumbing? may she have been succumbing? may we have been succumbing? may you have been succumbing? may they have been succumbing?
Interro-negative form
Simple form
mayn't I succumb? mayn't you succumb? mayn't she succumb? mayn't we succumb? mayn't you succumb? mayn't they succumb?
V-ing form
mayn't I be succumbing? mayn't you be succumbing? mayn't she be succumbing? mayn't we be succumbing? mayn't you be succumbing? mayn't they be succumbing?
Perfect
mayn't I have succumbed? mayn't you have succumbed? mayn't she have succumbed? mayn't we have succumbed? mayn't you have succumbed? mayn't they have succumbed?
V-ing perfect
mayn't I have been succumbing? mayn't you have been succumbing? mayn't she have been succumbing? mayn't we have been succumbing? mayn't you have been succumbing? mayn't they have been succumbing?