must surface
Verbe régulier : surface - surfaced- surfaced
Traduction française : faire surface - revêtir 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must surface
you must surface
she must surface
we must surface
you must surface
they must surface 	I must be surfacing
you must be surfacing
she must be surfacing
we must be surfacing
you must be surfacing
they must be surfacing	I must have surfaced
you must have surfaced
she must have surfaced
we must have surfaced
you must have surfaced
they must have surfaced	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	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must not surface
you must not surface
she must not surface
we must not surface
you must not surface
they must not surface 	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	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	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	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I surface?
must you surface?
must she surface?
must we surface?
must you surface?
must they surface? 	must I be surfacing?
must you be surfacing?
must she be surfacing?
must we be surfacing?
must you be surfacing?
must they be surfacing? 	must I have surfaced?
must you have surfaced?
must she have surfaced?
must we have surfaced?
must you have surfaced?
must they have surfaced? 	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? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I not surface?
must you not surface?
must she not surface?
must we not surface?
must you not surface?
must they not surface? 	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? 	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? 	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?