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