could decolorize
Regular verb: decolorize - decolorized- decolorized

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could decolorize
you could decolorize
he could decolorize
we could decolorize
you could decolorize
they could decolorize 	I could be decolorizing
you could be decolorizing
he could be decolorizing
we could be decolorizing
you could be decolorizing
they could be decolorizing	I could have decolorized
you could have decolorized
he could have decolorized
we could have decolorized
you could have decolorized
they could have decolorized	I could have been decolorizing
you could have been decolorizing
he could have been decolorizing
we could have been decolorizing
you could have been decolorizing
they could have been decolorizing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not decolorize
you could not decolorize
he could not decolorize
we could not decolorize
you could not decolorize
they could not decolorize 	I could not be decolorizing
you could not be decolorizing
he could not be decolorizing
we could not be decolorizing
you could not be decolorizing
they could not be decolorizing	I could not have decolorized
you could not have decolorized
he could not have decolorized
we could not have decolorized
you could not have decolorized
they could not have decolorized	I could not have been decolorizing
you could not have been decolorizing
he could not have been decolorizing
we could not have been decolorizing
you could not have been decolorizing
they could not have been decolorizing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I decolorize?
could you decolorize?
could he decolorize?
could we decolorize?
could you decolorize?
could they decolorize? 	could I be decolorizing?
could you be decolorizing?
could he be decolorizing?
could we be decolorizing?
could you be decolorizing?
could they be decolorizing? 	could I have decolorized?
could you have decolorized?
could he have decolorized?
could we have decolorized?
could you have decolorized?
could they have decolorized? 	could I have been decolorizing?
could you have been decolorizing?
could he have been decolorizing?
could we have been decolorizing?
could you have been decolorizing?
could they have been decolorizing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not decolorize?
could you not decolorize?
could he not decolorize?
could we not decolorize?
could you not decolorize?
could they not decolorize? 	could I not be decolorizing?
could you not be decolorizing?
could he not be decolorizing?
could we not be decolorizing?
could you not be decolorizing?
could they not be decolorizing? 	could I not have decolorized?
could you not have decolorized?
could he not have decolorized?
could we not have decolorized?
could you not have decolorized?
could they not have decolorized? 	could I not have been decolorizing?
could you not have been decolorizing?
could he not have been decolorizing?
could we not have been decolorizing?
could you not have been decolorizing?
could they not have been decolorizing?