may decalcify
Regular verb: decalcify - decalcified- decalcified

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

Negation 	
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I mayn't decalcify
you mayn't decalcify
she mayn't decalcify
we mayn't decalcify
you mayn't decalcify
they mayn't decalcify 	I mayn't be decalcifying
you mayn't be decalcifying
she mayn't be decalcifying
we mayn't be decalcifying
you mayn't be decalcifying
they mayn't be decalcifying	I mayn't have decalcified
you mayn't have decalcified
she mayn't have decalcified
we mayn't have decalcified
you mayn't have decalcified
they mayn't have decalcified	I mayn't have been decalcifying
you mayn't have been decalcifying
she mayn't have been decalcifying
we mayn't have been decalcifying
you mayn't have been decalcifying
they mayn't have been decalcifying	

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

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