must prebook
Verbe régulier : prebook - prebooked- prebooked

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must prebook
you must prebook
she must prebook
we must prebook
you must prebook
they must prebook 	I must be prebooking
you must be prebooking
she must be prebooking
we must be prebooking
you must be prebooking
they must be prebooking	I must have prebooked
you must have prebooked
she must have prebooked
we must have prebooked
you must have prebooked
they must have prebooked	I must have been prebooking
you must have been prebooking
she must have been prebooking
we must have been prebooking
you must have been prebooking
they must have been prebooking	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't prebook
you mustn't prebook
she mustn't prebook
we mustn't prebook
you mustn't prebook
they mustn't prebook 	I mustn't be prebooking
you mustn't be prebooking
she mustn't be prebooking
we mustn't be prebooking
you mustn't be prebooking
they mustn't be prebooking	I mustn't have prebooked
you mustn't have prebooked
she mustn't have prebooked
we mustn't have prebooked
you mustn't have prebooked
they mustn't have prebooked	I mustn't have been prebooking
you mustn't have been prebooking
she mustn't have been prebooking
we mustn't have been prebooking
you mustn't have been prebooking
they mustn't have been prebooking	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I prebook?
must you prebook?
must she prebook?
must we prebook?
must you prebook?
must they prebook? 	must I be prebooking?
must you be prebooking?
must she be prebooking?
must we be prebooking?
must you be prebooking?
must they be prebooking? 	must I have prebooked?
must you have prebooked?
must she have prebooked?
must we have prebooked?
must you have prebooked?
must they have prebooked? 	must I have been prebooking?
must you have been prebooking?
must she have been prebooking?
must we have been prebooking?
must you have been prebooking?
must they have been prebooking? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I prebook?
mustn't you prebook?
mustn't she prebook?
mustn't we prebook?
mustn't you prebook?
mustn't they prebook? 	mustn't I be prebooking?
mustn't you be prebooking?
mustn't she be prebooking?
mustn't we be prebooking?
mustn't you be prebooking?
mustn't they be prebooking? 	mustn't I have prebooked?
mustn't you have prebooked?
mustn't she have prebooked?
mustn't we have prebooked?
mustn't you have prebooked?
mustn't they have prebooked? 	mustn't I have been prebooking?
mustn't you have been prebooking?
mustn't she have been prebooking?
mustn't we have been prebooking?
mustn't you have been prebooking?
mustn't they have been prebooking?