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 may not surface you may not surface he may not surface we may not surface you may not surface they may not surface
V-ing form
I may not be surfacing you may not be surfacing he may not be surfacing we may not be surfacing you may not be surfacing they may not be surfacing
Perfect
I may not have surfaced you may not have surfaced he may not have surfaced we may not have surfaced you may not have surfaced they may not have surfaced
V-ing perfect
I may not have been surfacing you may not have been surfacing he may not have been surfacing we may not have been surfacing you may not have been surfacing they may not 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
may I not surface? may you not surface? may he not surface? may we not surface? may you not surface? may they not surface?
V-ing form
may I not be surfacing? may you not be surfacing? may he not be surfacing? may we not be surfacing? may you not be surfacing? may they not be surfacing?
Perfect
may I not have surfaced? may you not have surfaced? may he not have surfaced? may we not have surfaced? may you not have surfaced? may they not have surfaced?
V-ing perfect
may I not have been surfacing? may you not have been surfacing? may he not have been surfacing? may we not have been surfacing? may you not have been surfacing? may they not have been surfacing?