English verb conjugation
MUST DECALCIFY

Regular verb: decalcify - decalcified - decalcified

Affirmation

Simple form	V-ing form
I must decalcify you must decalcify she must decalcify we must decalcify you must decalcify they must decalcify	I must be decalcifying you must be decalcifying she must be decalcifying we must be decalcifying you must be decalcifying they must be decalcifying
Perfect	V-ing perfect
I must have decalcified you must have decalcified she must have decalcified we must have decalcified you must have decalcified they must have decalcified	I must have been decalcifying you must have been decalcifying she must have been decalcifying we must have been decalcifying you must have been decalcifying they must have been decalcifying

Negation

Simple form	V-ing form
I mustn't decalcify you mustn't decalcify she mustn't decalcify we mustn't decalcify you mustn't decalcify they mustn't decalcify	I mustn't be decalcifying you mustn't be decalcifying she mustn't be decalcifying we mustn't be decalcifying you mustn't be decalcifying they mustn't be decalcifying
Perfect	V-ing perfect
I mustn't have decalcified you mustn't have decalcified she mustn't have decalcified we mustn't have decalcified you mustn't have decalcified they mustn't have decalcified	I mustn't have been decalcifying you mustn't have been decalcifying she mustn't have been decalcifying we mustn't have been decalcifying you mustn't have been decalcifying they mustn't have been decalcifying

Interrogative form

Simple form	V-ing form
must I decalcify? must you decalcify? must she decalcify? must we decalcify? must you decalcify? must they decalcify?	must I be decalcifying? must you be decalcifying? must she be decalcifying? must we be decalcifying? must you be decalcifying? must they be decalcifying?
Perfect	V-ing perfect
must I have decalcified? must you have decalcified? must she have decalcified? must we have decalcified? must you have decalcified? must they have decalcified?	must I have been decalcifying? must you have been decalcifying? must she have been decalcifying? must we have been decalcifying? must you have been decalcifying? must they have been decalcifying?

Interro-negative form

Simple form	V-ing form
mustn't I decalcify? mustn't you decalcify? mustn't she decalcify? mustn't we decalcify? mustn't you decalcify? mustn't they decalcify?	mustn't I be decalcifying? mustn't you be decalcifying? mustn't she be decalcifying? mustn't we be decalcifying? mustn't you be decalcifying? mustn't they be decalcifying?
Perfect	V-ing perfect
mustn't I have decalcified? mustn't you have decalcified? mustn't she have decalcified? mustn't we have decalcified? mustn't you have decalcified? mustn't they have decalcified?	mustn't I have been decalcifying? mustn't you have been decalcifying? mustn't she have been decalcifying? mustn't we have been decalcifying? mustn't you have been decalcifying? mustn't they have been decalcifying?