could opt
Regular verb: opt - opted- opted

Affirmation 	
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I could opt
you could opt
she could opt
we could opt
you could opt
they could opt 	I could be opting
you could be opting
she could be opting
we could be opting
you could be opting
they could be opting	I could have opted
you could have opted
she could have opted
we could have opted
you could have opted
they could have opted	I could have been opting
you could have been opting
she could have been opting
we could have been opting
you could have been opting
they could have been opting	

Negation 	
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I could not opt
you could not opt
she could not opt
we could not opt
you could not opt
they could not opt 	I could not be opting
you could not be opting
she could not be opting
we could not be opting
you could not be opting
they could not be opting	I could not have opted
you could not have opted
she could not have opted
we could not have opted
you could not have opted
they could not have opted	I could not have been opting
you could not have been opting
she could not have been opting
we could not have been opting
you could not have been opting
they could not have been opting	

Interrogative form 	
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could I opt?
could you opt?
could she opt?
could we opt?
could you opt?
could they opt? 	could I be opting?
could you be opting?
could she be opting?
could we be opting?
could you be opting?
could they be opting? 	could I have opted?
could you have opted?
could she have opted?
could we have opted?
could you have opted?
could they have opted? 	could I have been opting?
could you have been opting?
could she have been opting?
could we have been opting?
could you have been opting?
could they have been opting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not opt?
could you not opt?
could she not opt?
could we not opt?
could you not opt?
could they not opt? 	could I not be opting?
could you not be opting?
could she not be opting?
could we not be opting?
could you not be opting?
could they not be opting? 	could I not have opted?
could you not have opted?
could she not have opted?
could we not have opted?
could you not have opted?
could they not have opted? 	could I not have been opting?
could you not have been opting?
could she not have been opting?
could we not have been opting?
could you not have been opting?
could they not have been opting?