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