could jackrabbit
Regular verb: jackrabbit - jackrabbited- jackrabbited

Affirmation 	
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I could jackrabbit
you could jackrabbit
he could jackrabbit
we could jackrabbit
you could jackrabbit
they could jackrabbit 	I could be jackrabbiting
you could be jackrabbiting
he could be jackrabbiting
we could be jackrabbiting
you could be jackrabbiting
they could be jackrabbiting	I could have jackrabbited
you could have jackrabbited
he could have jackrabbited
we could have jackrabbited
you could have jackrabbited
they could have jackrabbited	I could have been jackrabbiting
you could have been jackrabbiting
he could have been jackrabbiting
we could have been jackrabbiting
you could have been jackrabbiting
they could have been jackrabbiting	

Negation 	
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I could not jackrabbit
you could not jackrabbit
he could not jackrabbit
we could not jackrabbit
you could not jackrabbit
they could not jackrabbit 	I could not be jackrabbiting
you could not be jackrabbiting
he could not be jackrabbiting
we could not be jackrabbiting
you could not be jackrabbiting
they could not be jackrabbiting	I could not have jackrabbited
you could not have jackrabbited
he could not have jackrabbited
we could not have jackrabbited
you could not have jackrabbited
they could not have jackrabbited	I could not have been jackrabbiting
you could not have been jackrabbiting
he could not have been jackrabbiting
we could not have been jackrabbiting
you could not have been jackrabbiting
they could not have been jackrabbiting	

Interrogative form 	
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could I jackrabbit?
could you jackrabbit?
could he jackrabbit?
could we jackrabbit?
could you jackrabbit?
could they jackrabbit? 	could I be jackrabbiting?
could you be jackrabbiting?
could he be jackrabbiting?
could we be jackrabbiting?
could you be jackrabbiting?
could they be jackrabbiting? 	could I have jackrabbited?
could you have jackrabbited?
could he have jackrabbited?
could we have jackrabbited?
could you have jackrabbited?
could they have jackrabbited? 	could I have been jackrabbiting?
could you have been jackrabbiting?
could he have been jackrabbiting?
could we have been jackrabbiting?
could you have been jackrabbiting?
could they have been jackrabbiting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not jackrabbit?
could you not jackrabbit?
could he not jackrabbit?
could we not jackrabbit?
could you not jackrabbit?
could they not jackrabbit? 	could I not be jackrabbiting?
could you not be jackrabbiting?
could he not be jackrabbiting?
could we not be jackrabbiting?
could you not be jackrabbiting?
could they not be jackrabbiting? 	could I not have jackrabbited?
could you not have jackrabbited?
could he not have jackrabbited?
could we not have jackrabbited?
could you not have jackrabbited?
could they not have jackrabbited? 	could I not have been jackrabbiting?
could you not have been jackrabbiting?
could he not have been jackrabbiting?
could we not have been jackrabbiting?
could you not have been jackrabbiting?
could they not have been jackrabbiting?