could decalcify
Verbo regular: decalcify - decalcified- decalcified

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could decalcify
you could decalcify
he could decalcify
we could decalcify
you could decalcify
they could decalcify 	I could be decalcifying
you could be decalcifying
he could be decalcifying
we could be decalcifying
you could be decalcifying
they could be decalcifying	I could have decalcified
you could have decalcified
he could have decalcified
we could have decalcified
you could have decalcified
they could have decalcified	I could have been decalcifying
you could have been decalcifying
he could have been decalcifying
we could have been decalcifying
you could have been decalcifying
they could have been decalcifying	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't decalcify
you couldn't decalcify
he couldn't decalcify
we couldn't decalcify
you couldn't decalcify
they couldn't decalcify 	I couldn't be decalcifying
you couldn't be decalcifying
he couldn't be decalcifying
we couldn't be decalcifying
you couldn't be decalcifying
they couldn't be decalcifying	I couldn't have decalcified
you couldn't have decalcified
he couldn't have decalcified
we couldn't have decalcified
you couldn't have decalcified
they couldn't have decalcified	I couldn't have been decalcifying
you couldn't have been decalcifying
he couldn't have been decalcifying
we couldn't have been decalcifying
you couldn't have been decalcifying
they couldn't have been decalcifying	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I decalcify?
could you decalcify?
could he decalcify?
could we decalcify?
could you decalcify?
could they decalcify? 	could I be decalcifying?
could you be decalcifying?
could he be decalcifying?
could we be decalcifying?
could you be decalcifying?
could they be decalcifying? 	could I have decalcified?
could you have decalcified?
could he have decalcified?
could we have decalcified?
could you have decalcified?
could they have decalcified? 	could I have been decalcifying?
could you have been decalcifying?
could he have been decalcifying?
could we have been decalcifying?
could you have been decalcifying?
could they have been decalcifying? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I decalcify?
couldn't you decalcify?
couldn't he decalcify?
couldn't we decalcify?
couldn't you decalcify?
couldn't they decalcify? 	couldn't I be decalcifying?
couldn't you be decalcifying?
couldn't he be decalcifying?
couldn't we be decalcifying?
couldn't you be decalcifying?
couldn't they be decalcifying? 	couldn't I have decalcified?
couldn't you have decalcified?
couldn't he have decalcified?
couldn't we have decalcified?
couldn't you have decalcified?
couldn't they have decalcified? 	couldn't I have been decalcifying?
couldn't you have been decalcifying?
couldn't he have been decalcifying?
couldn't we have been decalcifying?
couldn't you have been decalcifying?
couldn't they have been decalcifying?