could piss
Regular verb: piss - pissed- pissed

Affirmation 	
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I could piss
you could piss
he could piss
we could piss
you could piss
they could piss 	I could be pissing
you could be pissing
he could be pissing
we could be pissing
you could be pissing
they could be pissing	I could have pissed
you could have pissed
he could have pissed
we could have pissed
you could have pissed
they could have pissed	I could have been pissing
you could have been pissing
he could have been pissing
we could have been pissing
you could have been pissing
they could have been pissing	

Negation 	
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I couldn't piss
you couldn't piss
he couldn't piss
we couldn't piss
you couldn't piss
they couldn't piss 	I couldn't be pissing
you couldn't be pissing
he couldn't be pissing
we couldn't be pissing
you couldn't be pissing
they couldn't be pissing	I couldn't have pissed
you couldn't have pissed
he couldn't have pissed
we couldn't have pissed
you couldn't have pissed
they couldn't have pissed	I couldn't have been pissing
you couldn't have been pissing
he couldn't have been pissing
we couldn't have been pissing
you couldn't have been pissing
they couldn't have been pissing	

Interrogative form 	
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could I piss?
could you piss?
could he piss?
could we piss?
could you piss?
could they piss? 	could I be pissing?
could you be pissing?
could he be pissing?
could we be pissing?
could you be pissing?
could they be pissing? 	could I have pissed?
could you have pissed?
could he have pissed?
could we have pissed?
could you have pissed?
could they have pissed? 	could I have been pissing?
could you have been pissing?
could he have been pissing?
could we have been pissing?
could you have been pissing?
could they have been pissing? 	

Interro-negative form 	
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couldn't I piss?
couldn't you piss?
couldn't he piss?
couldn't we piss?
couldn't you piss?
couldn't they piss? 	couldn't I be pissing?
couldn't you be pissing?
couldn't he be pissing?
couldn't we be pissing?
couldn't you be pissing?
couldn't they be pissing? 	couldn't I have pissed?
couldn't you have pissed?
couldn't he have pissed?
couldn't we have pissed?
couldn't you have pissed?
couldn't they have pissed? 	couldn't I have been pissing?
couldn't you have been pissing?
couldn't he have been pissing?
couldn't we have been pissing?
couldn't you have been pissing?
couldn't they have been pissing?