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