could backlist
Regular verb: backlist - backlisted- backlisted

Affirmation 	
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I could backlist
you could backlist
he could backlist
we could backlist
you could backlist
they could backlist 	I could be backlisting
you could be backlisting
he could be backlisting
we could be backlisting
you could be backlisting
they could be backlisting	I could have backlisted
you could have backlisted
he could have backlisted
we could have backlisted
you could have backlisted
they could have backlisted	I could have been backlisting
you could have been backlisting
he could have been backlisting
we could have been backlisting
you could have been backlisting
they could have been backlisting	

Negation 	
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I couldn't backlist
you couldn't backlist
he couldn't backlist
we couldn't backlist
you couldn't backlist
they couldn't backlist 	I couldn't be backlisting
you couldn't be backlisting
he couldn't be backlisting
we couldn't be backlisting
you couldn't be backlisting
they couldn't be backlisting	I couldn't have backlisted
you couldn't have backlisted
he couldn't have backlisted
we couldn't have backlisted
you couldn't have backlisted
they couldn't have backlisted	I couldn't have been backlisting
you couldn't have been backlisting
he couldn't have been backlisting
we couldn't have been backlisting
you couldn't have been backlisting
they couldn't have been backlisting	

Interrogative form 	
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could I backlist?
could you backlist?
could he backlist?
could we backlist?
could you backlist?
could they backlist? 	could I be backlisting?
could you be backlisting?
could he be backlisting?
could we be backlisting?
could you be backlisting?
could they be backlisting? 	could I have backlisted?
could you have backlisted?
could he have backlisted?
could we have backlisted?
could you have backlisted?
could they have backlisted? 	could I have been backlisting?
could you have been backlisting?
could he have been backlisting?
could we have been backlisting?
could you have been backlisting?
could they have been backlisting? 	

Interro-negative form 	
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couldn't I backlist?
couldn't you backlist?
couldn't he backlist?
couldn't we backlist?
couldn't you backlist?
couldn't they backlist? 	couldn't I be backlisting?
couldn't you be backlisting?
couldn't he be backlisting?
couldn't we be backlisting?
couldn't you be backlisting?
couldn't they be backlisting? 	couldn't I have backlisted?
couldn't you have backlisted?
couldn't he have backlisted?
couldn't we have backlisted?
couldn't you have backlisted?
couldn't they have backlisted? 	couldn't I have been backlisting?
couldn't you have been backlisting?
couldn't he have been backlisting?
couldn't we have been backlisting?
couldn't you have been backlisting?
couldn't they have been backlisting?