could upwell
Regular verb: upwell - upwelled- upwelled

Affirmation 	
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I could upwell
you could upwell
she could upwell
we could upwell
you could upwell
they could upwell 	I could be upwelling
you could be upwelling
she could be upwelling
we could be upwelling
you could be upwelling
they could be upwelling	I could have upwelled
you could have upwelled
she could have upwelled
we could have upwelled
you could have upwelled
they could have upwelled	I could have been upwelling
you could have been upwelling
she could have been upwelling
we could have been upwelling
you could have been upwelling
they could have been upwelling	

Negation 	
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I couldn't upwell
you couldn't upwell
she couldn't upwell
we couldn't upwell
you couldn't upwell
they couldn't upwell 	I couldn't be upwelling
you couldn't be upwelling
she couldn't be upwelling
we couldn't be upwelling
you couldn't be upwelling
they couldn't be upwelling	I couldn't have upwelled
you couldn't have upwelled
she couldn't have upwelled
we couldn't have upwelled
you couldn't have upwelled
they couldn't have upwelled	I couldn't have been upwelling
you couldn't have been upwelling
she couldn't have been upwelling
we couldn't have been upwelling
you couldn't have been upwelling
they couldn't have been upwelling	

Interrogative form 	
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could I upwell?
could you upwell?
could she upwell?
could we upwell?
could you upwell?
could they upwell? 	could I be upwelling?
could you be upwelling?
could she be upwelling?
could we be upwelling?
could you be upwelling?
could they be upwelling? 	could I have upwelled?
could you have upwelled?
could she have upwelled?
could we have upwelled?
could you have upwelled?
could they have upwelled? 	could I have been upwelling?
could you have been upwelling?
could she have been upwelling?
could we have been upwelling?
could you have been upwelling?
could they have been upwelling? 	

Interro-negative form 	
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couldn't I upwell?
couldn't you upwell?
couldn't she upwell?
couldn't we upwell?
couldn't you upwell?
couldn't they upwell? 	couldn't I be upwelling?
couldn't you be upwelling?
couldn't she be upwelling?
couldn't we be upwelling?
couldn't you be upwelling?
couldn't they be upwelling? 	couldn't I have upwelled?
couldn't you have upwelled?
couldn't she have upwelled?
couldn't we have upwelled?
couldn't you have upwelled?
couldn't they have upwelled? 	couldn't I have been upwelling?
couldn't you have been upwelling?
couldn't she have been upwelling?
couldn't we have been upwelling?
couldn't you have been upwelling?
couldn't they have been upwelling?