must backdate
Verbe régulier : backdate - backdated- backdated
Traduction française : antidater 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must backdate
you must backdate
he must backdate
we must backdate
you must backdate
they must backdate 	I must be backdating
you must be backdating
he must be backdating
we must be backdating
you must be backdating
they must be backdating	I must have backdated
you must have backdated
he must have backdated
we must have backdated
you must have backdated
they must have backdated	I must have been backdating
you must have been backdating
he must have been backdating
we must have been backdating
you must have been backdating
they must have been backdating	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must not backdate
you must not backdate
he must not backdate
we must not backdate
you must not backdate
they must not backdate 	I must not be backdating
you must not be backdating
he must not be backdating
we must not be backdating
you must not be backdating
they must not be backdating	I must not have backdated
you must not have backdated
he must not have backdated
we must not have backdated
you must not have backdated
they must not have backdated	I must not have been backdating
you must not have been backdating
he must not have been backdating
we must not have been backdating
you must not have been backdating
they must not have been backdating	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I backdate?
must you backdate?
must he backdate?
must we backdate?
must you backdate?
must they backdate? 	must I be backdating?
must you be backdating?
must he be backdating?
must we be backdating?
must you be backdating?
must they be backdating? 	must I have backdated?
must you have backdated?
must he have backdated?
must we have backdated?
must you have backdated?
must they have backdated? 	must I have been backdating?
must you have been backdating?
must he have been backdating?
must we have been backdating?
must you have been backdating?
must they have been backdating? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I not backdate?
must you not backdate?
must he not backdate?
must we not backdate?
must you not backdate?
must they not backdate? 	must I not be backdating?
must you not be backdating?
must he not be backdating?
must we not be backdating?
must you not be backdating?
must they not be backdating? 	must I not have backdated?
must you not have backdated?
must he not have backdated?
must we not have backdated?
must you not have backdated?
must they not have backdated? 	must I not have been backdating?
must you not have been backdating?
must he not have been backdating?
must we not have been backdating?
must you not have been backdating?
must they not have been backdating?