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