could regionalize
Regular verb: regionalize - regionalized- regionalized

Affirmation 	
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I could regionalize
you could regionalize
he could regionalize
we could regionalize
you could regionalize
they could regionalize 	I could be regionalizing
you could be regionalizing
he could be regionalizing
we could be regionalizing
you could be regionalizing
they could be regionalizing	I could have regionalized
you could have regionalized
he could have regionalized
we could have regionalized
you could have regionalized
they could have regionalized	I could have been regionalizing
you could have been regionalizing
he could have been regionalizing
we could have been regionalizing
you could have been regionalizing
they could have been regionalizing	

Negation 	
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I couldn't regionalize
you couldn't regionalize
he couldn't regionalize
we couldn't regionalize
you couldn't regionalize
they couldn't regionalize 	I couldn't be regionalizing
you couldn't be regionalizing
he couldn't be regionalizing
we couldn't be regionalizing
you couldn't be regionalizing
they couldn't be regionalizing	I couldn't have regionalized
you couldn't have regionalized
he couldn't have regionalized
we couldn't have regionalized
you couldn't have regionalized
they couldn't have regionalized	I couldn't have been regionalizing
you couldn't have been regionalizing
he couldn't have been regionalizing
we couldn't have been regionalizing
you couldn't have been regionalizing
they couldn't have been regionalizing	

Interrogative form 	
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could I regionalize?
could you regionalize?
could he regionalize?
could we regionalize?
could you regionalize?
could they regionalize? 	could I be regionalizing?
could you be regionalizing?
could he be regionalizing?
could we be regionalizing?
could you be regionalizing?
could they be regionalizing? 	could I have regionalized?
could you have regionalized?
could he have regionalized?
could we have regionalized?
could you have regionalized?
could they have regionalized? 	could I have been regionalizing?
could you have been regionalizing?
could he have been regionalizing?
could we have been regionalizing?
could you have been regionalizing?
could they have been regionalizing? 	

Interro-negative form 	
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couldn't I regionalize?
couldn't you regionalize?
couldn't he regionalize?
couldn't we regionalize?
couldn't you regionalize?
couldn't they regionalize? 	couldn't I be regionalizing?
couldn't you be regionalizing?
couldn't he be regionalizing?
couldn't we be regionalizing?
couldn't you be regionalizing?
couldn't they be regionalizing? 	couldn't I have regionalized?
couldn't you have regionalized?
couldn't he have regionalized?
couldn't we have regionalized?
couldn't you have regionalized?
couldn't they have regionalized? 	couldn't I have been regionalizing?
couldn't you have been regionalizing?
couldn't he have been regionalizing?
couldn't we have been regionalizing?
couldn't you have been regionalizing?
couldn't they have been regionalizing?