could jail
Regular verb: jail - jailed- jailed

Affirmation 	
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I could jail
you could jail
he could jail
we could jail
you could jail
they could jail 	I could be jailing
you could be jailing
he could be jailing
we could be jailing
you could be jailing
they could be jailing	I could have jailed
you could have jailed
he could have jailed
we could have jailed
you could have jailed
they could have jailed	I could have been jailing
you could have been jailing
he could have been jailing
we could have been jailing
you could have been jailing
they could have been jailing	

Negation 	
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I could not jail
you could not jail
he could not jail
we could not jail
you could not jail
they could not jail 	I could not be jailing
you could not be jailing
he could not be jailing
we could not be jailing
you could not be jailing
they could not be jailing	I could not have jailed
you could not have jailed
he could not have jailed
we could not have jailed
you could not have jailed
they could not have jailed	I could not have been jailing
you could not have been jailing
he could not have been jailing
we could not have been jailing
you could not have been jailing
they could not have been jailing	

Interrogative form 	
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could I jail?
could you jail?
could he jail?
could we jail?
could you jail?
could they jail? 	could I be jailing?
could you be jailing?
could he be jailing?
could we be jailing?
could you be jailing?
could they be jailing? 	could I have jailed?
could you have jailed?
could he have jailed?
could we have jailed?
could you have jailed?
could they have jailed? 	could I have been jailing?
could you have been jailing?
could he have been jailing?
could we have been jailing?
could you have been jailing?
could they have been jailing? 	

Interro-negative form 	
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could I not jail?
could you not jail?
could he not jail?
could we not jail?
could you not jail?
could they not jail? 	could I not be jailing?
could you not be jailing?
could he not be jailing?
could we not be jailing?
could you not be jailing?
could they not be jailing? 	could I not have jailed?
could you not have jailed?
could he not have jailed?
could we not have jailed?
could you not have jailed?
could they not have jailed? 	could I not have been jailing?
could you not have been jailing?
could he not have been jailing?
could we not have been jailing?
could you not have been jailing?
could they not have been jailing?