could decimalize
Regular verb: decimalize - decimalized- decimalized

Affirmation 	
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I could decimalize
you could decimalize
he could decimalize
we could decimalize
you could decimalize
they could decimalize 	I could be decimalizing
you could be decimalizing
he could be decimalizing
we could be decimalizing
you could be decimalizing
they could be decimalizing	I could have decimalized
you could have decimalized
he could have decimalized
we could have decimalized
you could have decimalized
they could have decimalized	I could have been decimalizing
you could have been decimalizing
he could have been decimalizing
we could have been decimalizing
you could have been decimalizing
they could have been decimalizing	

Negation 	
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I couldn't decimalize
you couldn't decimalize
he couldn't decimalize
we couldn't decimalize
you couldn't decimalize
they couldn't decimalize 	I couldn't be decimalizing
you couldn't be decimalizing
he couldn't be decimalizing
we couldn't be decimalizing
you couldn't be decimalizing
they couldn't be decimalizing	I couldn't have decimalized
you couldn't have decimalized
he couldn't have decimalized
we couldn't have decimalized
you couldn't have decimalized
they couldn't have decimalized	I couldn't have been decimalizing
you couldn't have been decimalizing
he couldn't have been decimalizing
we couldn't have been decimalizing
you couldn't have been decimalizing
they couldn't have been decimalizing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I decimalize?
could you decimalize?
could he decimalize?
could we decimalize?
could you decimalize?
could they decimalize? 	could I be decimalizing?
could you be decimalizing?
could he be decimalizing?
could we be decimalizing?
could you be decimalizing?
could they be decimalizing? 	could I have decimalized?
could you have decimalized?
could he have decimalized?
could we have decimalized?
could you have decimalized?
could they have decimalized? 	could I have been decimalizing?
could you have been decimalizing?
could he have been decimalizing?
could we have been decimalizing?
could you have been decimalizing?
could they have been decimalizing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I decimalize?
couldn't you decimalize?
couldn't he decimalize?
couldn't we decimalize?
couldn't you decimalize?
couldn't they decimalize? 	couldn't I be decimalizing?
couldn't you be decimalizing?
couldn't he be decimalizing?
couldn't we be decimalizing?
couldn't you be decimalizing?
couldn't they be decimalizing? 	couldn't I have decimalized?
couldn't you have decimalized?
couldn't he have decimalized?
couldn't we have decimalized?
couldn't you have decimalized?
couldn't they have decimalized? 	couldn't I have been decimalizing?
couldn't you have been decimalizing?
couldn't he have been decimalizing?
couldn't we have been decimalizing?
couldn't you have been decimalizing?
couldn't they have been decimalizing?