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