must bitter
Verbe régulier : bitter - bittered- bittered

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must bitter
you must bitter
he must bitter
we must bitter
you must bitter
they must bitter 	I must be bittering
you must be bittering
he must be bittering
we must be bittering
you must be bittering
they must be bittering	I must have bittered
you must have bittered
he must have bittered
we must have bittered
you must have bittered
they must have bittered	I must have been bittering
you must have been bittering
he must have been bittering
we must have been bittering
you must have been bittering
they must have been bittering	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must not bitter
you must not bitter
he must not bitter
we must not bitter
you must not bitter
they must not bitter 	I must not be bittering
you must not be bittering
he must not be bittering
we must not be bittering
you must not be bittering
they must not be bittering	I must not have bittered
you must not have bittered
he must not have bittered
we must not have bittered
you must not have bittered
they must not have bittered	I must not have been bittering
you must not have been bittering
he must not have been bittering
we must not have been bittering
you must not have been bittering
they must not have been bittering	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I bitter?
must you bitter?
must he bitter?
must we bitter?
must you bitter?
must they bitter? 	must I be bittering?
must you be bittering?
must he be bittering?
must we be bittering?
must you be bittering?
must they be bittering? 	must I have bittered?
must you have bittered?
must he have bittered?
must we have bittered?
must you have bittered?
must they have bittered? 	must I have been bittering?
must you have been bittering?
must he have been bittering?
must we have been bittering?
must you have been bittering?
must they have been bittering? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I not bitter?
must you not bitter?
must he not bitter?
must we not bitter?
must you not bitter?
must they not bitter? 	must I not be bittering?
must you not be bittering?
must he not be bittering?
must we not be bittering?
must you not be bittering?
must they not be bittering? 	must I not have bittered?
must you not have bittered?
must he not have bittered?
must we not have bittered?
must you not have bittered?
must they not have bittered? 	must I not have been bittering?
must you not have been bittering?
must he not have been bittering?
must we not have been bittering?
must you not have been bittering?
must they not have been bittering?