must study
Verbe régulier : study - studied- studied
Traduction française : étudier 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must study
you must study
he must study
we must study
you must study
they must study 	I must be studying
you must be studying
he must be studying
we must be studying
you must be studying
they must be studying	I must have studied
you must have studied
he must have studied
we must have studied
you must have studied
they must have studied	I must have been studying
you must have been studying
he must have been studying
we must have been studying
you must have been studying
they must have been studying	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must not study
you must not study
he must not study
we must not study
you must not study
they must not study 	I must not be studying
you must not be studying
he must not be studying
we must not be studying
you must not be studying
they must not be studying	I must not have studied
you must not have studied
he must not have studied
we must not have studied
you must not have studied
they must not have studied	I must not have been studying
you must not have been studying
he must not have been studying
we must not have been studying
you must not have been studying
they must not have been studying	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I study?
must you study?
must he study?
must we study?
must you study?
must they study? 	must I be studying?
must you be studying?
must he be studying?
must we be studying?
must you be studying?
must they be studying? 	must I have studied?
must you have studied?
must he have studied?
must we have studied?
must you have studied?
must they have studied? 	must I have been studying?
must you have been studying?
must he have been studying?
must we have been studying?
must you have been studying?
must they have been studying? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I not study?
must you not study?
must he not study?
must we not study?
must you not study?
must they not study? 	must I not be studying?
must you not be studying?
must he not be studying?
must we not be studying?
must you not be studying?
must they not be studying? 	must I not have studied?
must you not have studied?
must he not have studied?
must we not have studied?
must you not have studied?
must they not have studied? 	must I not have been studying?
must you not have been studying?
must he not have been studying?
must we not have been studying?
must you not have been studying?
must they not have been studying?