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