could herniate
Regular verb: herniate - herniated- herniated

Affirmation 	
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I could herniate
you could herniate
he could herniate
we could herniate
you could herniate
they could herniate 	I could be herniating
you could be herniating
he could be herniating
we could be herniating
you could be herniating
they could be herniating	I could have herniated
you could have herniated
he could have herniated
we could have herniated
you could have herniated
they could have herniated	I could have been herniating
you could have been herniating
he could have been herniating
we could have been herniating
you could have been herniating
they could have been herniating	

Negation 	
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I could not herniate
you could not herniate
he could not herniate
we could not herniate
you could not herniate
they could not herniate 	I could not be herniating
you could not be herniating
he could not be herniating
we could not be herniating
you could not be herniating
they could not be herniating	I could not have herniated
you could not have herniated
he could not have herniated
we could not have herniated
you could not have herniated
they could not have herniated	I could not have been herniating
you could not have been herniating
he could not have been herniating
we could not have been herniating
you could not have been herniating
they could not have been herniating	

Interrogative form 	
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could I herniate?
could you herniate?
could he herniate?
could we herniate?
could you herniate?
could they herniate? 	could I be herniating?
could you be herniating?
could he be herniating?
could we be herniating?
could you be herniating?
could they be herniating? 	could I have herniated?
could you have herniated?
could he have herniated?
could we have herniated?
could you have herniated?
could they have herniated? 	could I have been herniating?
could you have been herniating?
could he have been herniating?
could we have been herniating?
could you have been herniating?
could they have been herniating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not herniate?
could you not herniate?
could he not herniate?
could we not herniate?
could you not herniate?
could they not herniate? 	could I not be herniating?
could you not be herniating?
could he not be herniating?
could we not be herniating?
could you not be herniating?
could they not be herniating? 	could I not have herniated?
could you not have herniated?
could he not have herniated?
could we not have herniated?
could you not have herniated?
could they not have herniated? 	could I not have been herniating?
could you not have been herniating?
could he not have been herniating?
could we not have been herniating?
could you not have been herniating?
could they not have been herniating?