must preobtain
Verbe régulier : preobtain - preobtained- preobtained

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must preobtain
you must preobtain
he must preobtain
we must preobtain
you must preobtain
they must preobtain 	I must be preobtaining
you must be preobtaining
he must be preobtaining
we must be preobtaining
you must be preobtaining
they must be preobtaining	I must have preobtained
you must have preobtained
he must have preobtained
we must have preobtained
you must have preobtained
they must have preobtained	I must have been preobtaining
you must have been preobtaining
he must have been preobtaining
we must have been preobtaining
you must have been preobtaining
they must have been preobtaining	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must not preobtain
you must not preobtain
he must not preobtain
we must not preobtain
you must not preobtain
they must not preobtain 	I must not be preobtaining
you must not be preobtaining
he must not be preobtaining
we must not be preobtaining
you must not be preobtaining
they must not be preobtaining	I must not have preobtained
you must not have preobtained
he must not have preobtained
we must not have preobtained
you must not have preobtained
they must not have preobtained	I must not have been preobtaining
you must not have been preobtaining
he must not have been preobtaining
we must not have been preobtaining
you must not have been preobtaining
they must not have been preobtaining	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I preobtain?
must you preobtain?
must he preobtain?
must we preobtain?
must you preobtain?
must they preobtain? 	must I be preobtaining?
must you be preobtaining?
must he be preobtaining?
must we be preobtaining?
must you be preobtaining?
must they be preobtaining? 	must I have preobtained?
must you have preobtained?
must he have preobtained?
must we have preobtained?
must you have preobtained?
must they have preobtained? 	must I have been preobtaining?
must you have been preobtaining?
must he have been preobtaining?
must we have been preobtaining?
must you have been preobtaining?
must they have been preobtaining? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I not preobtain?
must you not preobtain?
must he not preobtain?
must we not preobtain?
must you not preobtain?
must they not preobtain? 	must I not be preobtaining?
must you not be preobtaining?
must he not be preobtaining?
must we not be preobtaining?
must you not be preobtaining?
must they not be preobtaining? 	must I not have preobtained?
must you not have preobtained?
must he not have preobtained?
must we not have preobtained?
must you not have preobtained?
must they not have preobtained? 	must I not have been preobtaining?
must you not have been preobtaining?
must he not have been preobtaining?
must we not have been preobtaining?
must you not have been preobtaining?
must they not have been preobtaining?