I can decalcify you can decalcify he can decalcify we can decalcify you can decalcify they can decalcify
V-ing form
I can be decalcifying you can be decalcifying he can be decalcifying we can be decalcifying you can be decalcifying they can be decalcifying
Perfect
I can have decalcified you can have decalcified he can have decalcified we can have decalcified you can have decalcified they can have decalcified
V-ing perfect
I can have been decalcifying you can have been decalcifying he can have been decalcifying we can have been decalcifying you can have been decalcifying they can have been decalcifying
Negation
Simple form
I can't decalcify you can't decalcify he can't decalcify we can't decalcify you can't decalcify they can't decalcify
V-ing form
I can't be decalcifying you can't be decalcifying he can't be decalcifying we can't be decalcifying you can't be decalcifying they can't be decalcifying
Perfect
I can't have decalcified you can't have decalcified he can't have decalcified we can't have decalcified you can't have decalcified they can't have decalcified
V-ing perfect
I can't have been decalcifying you can't have been decalcifying he can't have been decalcifying we can't have been decalcifying you can't have been decalcifying they can't have been decalcifying
Interrogative form
Simple form
can I decalcify? can you decalcify? can he decalcify? can we decalcify? can you decalcify? can they decalcify?
V-ing form
can I be decalcifying? can you be decalcifying? can he be decalcifying? can we be decalcifying? can you be decalcifying? can they be decalcifying?
Perfect
can I have decalcified? can you have decalcified? can he have decalcified? can we have decalcified? can you have decalcified? can they have decalcified?
V-ing perfect
can I have been decalcifying? can you have been decalcifying? can he have been decalcifying? can we have been decalcifying? can you have been decalcifying? can they have been decalcifying?
Interro-negative form
Simple form
can't I decalcify? can't you decalcify? can't he decalcify? can't we decalcify? can't you decalcify? can't they decalcify?
V-ing form
can't I be decalcifying? can't you be decalcifying? can't he be decalcifying? can't we be decalcifying? can't you be decalcifying? can't they be decalcifying?
Perfect
can't I have decalcified? can't you have decalcified? can't he have decalcified? can't we have decalcified? can't you have decalcified? can't they have decalcified?
V-ing perfect
can't I have been decalcifying? can't you have been decalcifying? can't he have been decalcifying? can't we have been decalcifying? can't you have been decalcifying? can't they have been decalcifying?