must perk
Verbe régulier : perk - perked- perked
Traduction française : passer 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must perk
you must perk
she must perk
we must perk
you must perk
they must perk 	I must be perking
you must be perking
she must be perking
we must be perking
you must be perking
they must be perking	I must have perked
you must have perked
she must have perked
we must have perked
you must have perked
they must have perked	I must have been perking
you must have been perking
she must have been perking
we must have been perking
you must have been perking
they must have been perking	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must not perk
you must not perk
she must not perk
we must not perk
you must not perk
they must not perk 	I must not be perking
you must not be perking
she must not be perking
we must not be perking
you must not be perking
they must not be perking	I must not have perked
you must not have perked
she must not have perked
we must not have perked
you must not have perked
they must not have perked	I must not have been perking
you must not have been perking
she must not have been perking
we must not have been perking
you must not have been perking
they must not have been perking	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I perk?
must you perk?
must she perk?
must we perk?
must you perk?
must they perk? 	must I be perking?
must you be perking?
must she be perking?
must we be perking?
must you be perking?
must they be perking? 	must I have perked?
must you have perked?
must she have perked?
must we have perked?
must you have perked?
must they have perked? 	must I have been perking?
must you have been perking?
must she have been perking?
must we have been perking?
must you have been perking?
must they have been perking? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I not perk?
must you not perk?
must she not perk?
must we not perk?
must you not perk?
must they not perk? 	must I not be perking?
must you not be perking?
must she not be perking?
must we not be perking?
must you not be perking?
must they not be perking? 	must I not have perked?
must you not have perked?
must she not have perked?
must we not have perked?
must you not have perked?
must they not have perked? 	must I not have been perking?
must you not have been perking?
must she not have been perking?
must we not have been perking?
must you not have been perking?
must they not have been perking?