must proof
Verbe régulier : proof - proofed- proofed
Traduction française : imperméabiliser - corriger les épreuves de 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must proof
you must proof
he must proof
we must proof
you must proof
they must proof 	I must be proofing
you must be proofing
he must be proofing
we must be proofing
you must be proofing
they must be proofing	I must have proofed
you must have proofed
he must have proofed
we must have proofed
you must have proofed
they must have proofed	I must have been proofing
you must have been proofing
he must have been proofing
we must have been proofing
you must have been proofing
they must have been proofing	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must not proof
you must not proof
he must not proof
we must not proof
you must not proof
they must not proof 	I must not be proofing
you must not be proofing
he must not be proofing
we must not be proofing
you must not be proofing
they must not be proofing	I must not have proofed
you must not have proofed
he must not have proofed
we must not have proofed
you must not have proofed
they must not have proofed	I must not have been proofing
you must not have been proofing
he must not have been proofing
we must not have been proofing
you must not have been proofing
they must not have been proofing	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I proof?
must you proof?
must he proof?
must we proof?
must you proof?
must they proof? 	must I be proofing?
must you be proofing?
must he be proofing?
must we be proofing?
must you be proofing?
must they be proofing? 	must I have proofed?
must you have proofed?
must he have proofed?
must we have proofed?
must you have proofed?
must they have proofed? 	must I have been proofing?
must you have been proofing?
must he have been proofing?
must we have been proofing?
must you have been proofing?
must they have been proofing? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I not proof?
must you not proof?
must he not proof?
must we not proof?
must you not proof?
must they not proof? 	must I not be proofing?
must you not be proofing?
must he not be proofing?
must we not be proofing?
must you not be proofing?
must they not be proofing? 	must I not have proofed?
must you not have proofed?
must he not have proofed?
must we not have proofed?
must you not have proofed?
must they not have proofed? 	must I not have been proofing?
must you not have been proofing?
must he not have been proofing?
must we not have been proofing?
must you not have been proofing?
must they not have been proofing?