must degrease
Verbe régulier : degrease - degreased- degreased

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must degrease
you must degrease
he must degrease
we must degrease
you must degrease
they must degrease 	I must be degreasing
you must be degreasing
he must be degreasing
we must be degreasing
you must be degreasing
they must be degreasing	I must have degreased
you must have degreased
he must have degreased
we must have degreased
you must have degreased
they must have degreased	I must have been degreasing
you must have been degreasing
he must have been degreasing
we must have been degreasing
you must have been degreasing
they must have been degreasing	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must not degrease
you must not degrease
he must not degrease
we must not degrease
you must not degrease
they must not degrease 	I must not be degreasing
you must not be degreasing
he must not be degreasing
we must not be degreasing
you must not be degreasing
they must not be degreasing	I must not have degreased
you must not have degreased
he must not have degreased
we must not have degreased
you must not have degreased
they must not have degreased	I must not have been degreasing
you must not have been degreasing
he must not have been degreasing
we must not have been degreasing
you must not have been degreasing
they must not have been degreasing	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I degrease?
must you degrease?
must he degrease?
must we degrease?
must you degrease?
must they degrease? 	must I be degreasing?
must you be degreasing?
must he be degreasing?
must we be degreasing?
must you be degreasing?
must they be degreasing? 	must I have degreased?
must you have degreased?
must he have degreased?
must we have degreased?
must you have degreased?
must they have degreased? 	must I have been degreasing?
must you have been degreasing?
must he have been degreasing?
must we have been degreasing?
must you have been degreasing?
must they have been degreasing? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I not degrease?
must you not degrease?
must he not degrease?
must we not degrease?
must you not degrease?
must they not degrease? 	must I not be degreasing?
must you not be degreasing?
must he not be degreasing?
must we not be degreasing?
must you not be degreasing?
must they not be degreasing? 	must I not have degreased?
must you not have degreased?
must he not have degreased?
must we not have degreased?
must you not have degreased?
must they not have degreased? 	must I not have been degreasing?
must you not have been degreasing?
must he not have been degreasing?
must we not have been degreasing?
must you not have been degreasing?
must they not have been degreasing?