must prework
Verbe régulier : prework - preworked- preworked

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must prework
you must prework
she must prework
we must prework
you must prework
they must prework 	I must be preworking
you must be preworking
she must be preworking
we must be preworking
you must be preworking
they must be preworking	I must have preworked
you must have preworked
she must have preworked
we must have preworked
you must have preworked
they must have preworked	I must have been preworking
you must have been preworking
she must have been preworking
we must have been preworking
you must have been preworking
they must have been preworking	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must not prework
you must not prework
she must not prework
we must not prework
you must not prework
they must not prework 	I must not be preworking
you must not be preworking
she must not be preworking
we must not be preworking
you must not be preworking
they must not be preworking	I must not have preworked
you must not have preworked
she must not have preworked
we must not have preworked
you must not have preworked
they must not have preworked	I must not have been preworking
you must not have been preworking
she must not have been preworking
we must not have been preworking
you must not have been preworking
they must not have been preworking	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I prework?
must you prework?
must she prework?
must we prework?
must you prework?
must they prework? 	must I be preworking?
must you be preworking?
must she be preworking?
must we be preworking?
must you be preworking?
must they be preworking? 	must I have preworked?
must you have preworked?
must she have preworked?
must we have preworked?
must you have preworked?
must they have preworked? 	must I have been preworking?
must you have been preworking?
must she have been preworking?
must we have been preworking?
must you have been preworking?
must they have been preworking? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I not prework?
must you not prework?
must she not prework?
must we not prework?
must you not prework?
must they not prework? 	must I not be preworking?
must you not be preworking?
must she not be preworking?
must we not be preworking?
must you not be preworking?
must they not be preworking? 	must I not have preworked?
must you not have preworked?
must she not have preworked?
must we not have preworked?
must you not have preworked?
must they not have preworked? 	must I not have been preworking?
must you not have been preworking?
must she not have been preworking?
must we not have been preworking?
must you not have been preworking?
must they not have been preworking?