could refund
Regular verb: refund - refunded- refunded

Affirmation 	
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I could refund
you could refund
she could refund
we could refund
you could refund
they could refund 	I could be refunding
you could be refunding
she could be refunding
we could be refunding
you could be refunding
they could be refunding	I could have refunded
you could have refunded
she could have refunded
we could have refunded
you could have refunded
they could have refunded	I could have been refunding
you could have been refunding
she could have been refunding
we could have been refunding
you could have been refunding
they could have been refunding	

Negation 	
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I couldn't refund
you couldn't refund
she couldn't refund
we couldn't refund
you couldn't refund
they couldn't refund 	I couldn't be refunding
you couldn't be refunding
she couldn't be refunding
we couldn't be refunding
you couldn't be refunding
they couldn't be refunding	I couldn't have refunded
you couldn't have refunded
she couldn't have refunded
we couldn't have refunded
you couldn't have refunded
they couldn't have refunded	I couldn't have been refunding
you couldn't have been refunding
she couldn't have been refunding
we couldn't have been refunding
you couldn't have been refunding
they couldn't have been refunding	

Interrogative form 	
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could I refund?
could you refund?
could she refund?
could we refund?
could you refund?
could they refund? 	could I be refunding?
could you be refunding?
could she be refunding?
could we be refunding?
could you be refunding?
could they be refunding? 	could I have refunded?
could you have refunded?
could she have refunded?
could we have refunded?
could you have refunded?
could they have refunded? 	could I have been refunding?
could you have been refunding?
could she have been refunding?
could we have been refunding?
could you have been refunding?
could they have been refunding? 	

Interro-negative form 	
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couldn't I refund?
couldn't you refund?
couldn't she refund?
couldn't we refund?
couldn't you refund?
couldn't they refund? 	couldn't I be refunding?
couldn't you be refunding?
couldn't she be refunding?
couldn't we be refunding?
couldn't you be refunding?
couldn't they be refunding? 	couldn't I have refunded?
couldn't you have refunded?
couldn't she have refunded?
couldn't we have refunded?
couldn't you have refunded?
couldn't they have refunded? 	couldn't I have been refunding?
couldn't you have been refunding?
couldn't she have been refunding?
couldn't we have been refunding?
couldn't you have been refunding?
couldn't they have been refunding?