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 mustn't surface
you mustn't surface
she mustn't surface
we mustn't surface
you mustn't surface
they mustn't surface 	I mustn't be surfacing
you mustn't be surfacing
she mustn't be surfacing
we mustn't be surfacing
you mustn't be surfacing
they mustn't be surfacing	I mustn't have surfaced
you mustn't have surfaced
she mustn't have surfaced
we mustn't have surfaced
you mustn't have surfaced
they mustn't have surfaced	I mustn't have been surfacing
you mustn't have been surfacing
she mustn't have been surfacing
we mustn't have been surfacing
you mustn't have been surfacing
they mustn't 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 	
mustn't I surface?
mustn't you surface?
mustn't she surface?
mustn't we surface?
mustn't you surface?
mustn't they surface? 	mustn't I be surfacing?
mustn't you be surfacing?
mustn't she be surfacing?
mustn't we be surfacing?
mustn't you be surfacing?
mustn't they be surfacing? 	mustn't I have surfaced?
mustn't you have surfaced?
mustn't she have surfaced?
mustn't we have surfaced?
mustn't you have surfaced?
mustn't they have surfaced? 	mustn't I have been surfacing?
mustn't you have been surfacing?
mustn't she have been surfacing?
mustn't we have been surfacing?
mustn't you have been surfacing?
mustn't they have been surfacing?