I must surface you must surface she must surface we must surface you must surface they must surface
Forma com V-ing
I must be surfacing you must be surfacing she must be surfacing we must be surfacing you must be surfacing they must be surfacing
Perfeito
I must have surfaced you must have surfaced she must have surfaced we must have surfaced you must have surfaced they must have surfaced
Perfeito com V-ing
I must have been surfacing you must have been surfacing she must have been surfacing we must have been surfacing you must have been surfacing they must have been surfacing
Negação
Forma simple
I must not surface you must not surface she must not surface we must not surface you must not surface they must not surface
Forma com V-ing
I must not be surfacing you must not be surfacing she must not be surfacing we must not be surfacing you must not be surfacing they must not be surfacing
Perfeito
I must not have surfaced you must not have surfaced she must not have surfaced we must not have surfaced you must not have surfaced they must not have surfaced
Perfeito com V-ing
I must not have been surfacing you must not have been surfacing she must not have been surfacing we must not have been surfacing you must not have been surfacing they must not have been surfacing
Forma interrogativa
Forma simple
must I surface? must you surface? must she surface? must we surface? must you surface? must they surface?
Forma com V-ing
must I be surfacing? must you be surfacing? must she be surfacing? must we be surfacing? must you be surfacing? must they be surfacing?
Perfeito
must I have surfaced? must you have surfaced? must she have surfaced? must we have surfaced? must you have surfaced? must they have surfaced?
Perfeito com V-ing
must I have been surfacing? must you have been surfacing? must she have been surfacing? must we have been surfacing? must you have been surfacing? must they have been surfacing?
Forma interro-Negação
Forma simple
must I not surface? must you not surface? must she not surface? must we not surface? must you not surface? must they not surface?
Forma com V-ing
must I not be surfacing? must you not be surfacing? must she not be surfacing? must we not be surfacing? must you not be surfacing? must they not be surfacing?
Perfeito
must I not have surfaced? must you not have surfaced? must she not have surfaced? must we not have surfaced? must you not have surfaced? must they not have surfaced?
Perfeito com V-ing
must I not have been surfacing? must you not have been surfacing? must she not have been surfacing? must we not have been surfacing? must you not have been surfacing? must they not have been surfacing?