must acidify
Verbe régulier : acidify - acidified- acidified

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must acidify
you must acidify
he must acidify
we must acidify
you must acidify
they must acidify 	I must be acidifying
you must be acidifying
he must be acidifying
we must be acidifying
you must be acidifying
they must be acidifying	I must have acidified
you must have acidified
he must have acidified
we must have acidified
you must have acidified
they must have acidified	I must have been acidifying
you must have been acidifying
he must have been acidifying
we must have been acidifying
you must have been acidifying
they must have been acidifying	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't acidify
you mustn't acidify
he mustn't acidify
we mustn't acidify
you mustn't acidify
they mustn't acidify 	I mustn't be acidifying
you mustn't be acidifying
he mustn't be acidifying
we mustn't be acidifying
you mustn't be acidifying
they mustn't be acidifying	I mustn't have acidified
you mustn't have acidified
he mustn't have acidified
we mustn't have acidified
you mustn't have acidified
they mustn't have acidified	I mustn't have been acidifying
you mustn't have been acidifying
he mustn't have been acidifying
we mustn't have been acidifying
you mustn't have been acidifying
they mustn't have been acidifying	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I acidify?
must you acidify?
must he acidify?
must we acidify?
must you acidify?
must they acidify? 	must I be acidifying?
must you be acidifying?
must he be acidifying?
must we be acidifying?
must you be acidifying?
must they be acidifying? 	must I have acidified?
must you have acidified?
must he have acidified?
must we have acidified?
must you have acidified?
must they have acidified? 	must I have been acidifying?
must you have been acidifying?
must he have been acidifying?
must we have been acidifying?
must you have been acidifying?
must they have been acidifying? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I acidify?
mustn't you acidify?
mustn't he acidify?
mustn't we acidify?
mustn't you acidify?
mustn't they acidify? 	mustn't I be acidifying?
mustn't you be acidifying?
mustn't he be acidifying?
mustn't we be acidifying?
mustn't you be acidifying?
mustn't they be acidifying? 	mustn't I have acidified?
mustn't you have acidified?
mustn't he have acidified?
mustn't we have acidified?
mustn't you have acidified?
mustn't they have acidified? 	mustn't I have been acidifying?
mustn't you have been acidifying?
mustn't he have been acidifying?
mustn't we have been acidifying?
mustn't you have been acidifying?
mustn't they have been acidifying?