must require
Verbe régulier : require - required- required
Traduction française : exiger - nécessiter 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must require
you must require
he must require
we must require
you must require
they must require 	I must be requiring
you must be requiring
he must be requiring
we must be requiring
you must be requiring
they must be requiring	I must have required
you must have required
he must have required
we must have required
you must have required
they must have required	I must have been requiring
you must have been requiring
he must have been requiring
we must have been requiring
you must have been requiring
they must have been requiring	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must not require
you must not require
he must not require
we must not require
you must not require
they must not require 	I must not be requiring
you must not be requiring
he must not be requiring
we must not be requiring
you must not be requiring
they must not be requiring	I must not have required
you must not have required
he must not have required
we must not have required
you must not have required
they must not have required	I must not have been requiring
you must not have been requiring
he must not have been requiring
we must not have been requiring
you must not have been requiring
they must not have been requiring	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I require?
must you require?
must he require?
must we require?
must you require?
must they require? 	must I be requiring?
must you be requiring?
must he be requiring?
must we be requiring?
must you be requiring?
must they be requiring? 	must I have required?
must you have required?
must he have required?
must we have required?
must you have required?
must they have required? 	must I have been requiring?
must you have been requiring?
must he have been requiring?
must we have been requiring?
must you have been requiring?
must they have been requiring? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I not require?
must you not require?
must he not require?
must we not require?
must you not require?
must they not require? 	must I not be requiring?
must you not be requiring?
must he not be requiring?
must we not be requiring?
must you not be requiring?
must they not be requiring? 	must I not have required?
must you not have required?
must he not have required?
must we not have required?
must you not have required?
must they not have required? 	must I not have been requiring?
must you not have been requiring?
must he not have been requiring?
must we not have been requiring?
must you not have been requiring?
must they not have been requiring?