could upchuck
Regular verb: upchuck - upchucked- upchucked

Affirmation 	
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I could upchuck
you could upchuck
he could upchuck
we could upchuck
you could upchuck
they could upchuck 	I could be upchucking
you could be upchucking
he could be upchucking
we could be upchucking
you could be upchucking
they could be upchucking	I could have upchucked
you could have upchucked
he could have upchucked
we could have upchucked
you could have upchucked
they could have upchucked	I could have been upchucking
you could have been upchucking
he could have been upchucking
we could have been upchucking
you could have been upchucking
they could have been upchucking	

Negation 	
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I couldn't upchuck
you couldn't upchuck
he couldn't upchuck
we couldn't upchuck
you couldn't upchuck
they couldn't upchuck 	I couldn't be upchucking
you couldn't be upchucking
he couldn't be upchucking
we couldn't be upchucking
you couldn't be upchucking
they couldn't be upchucking	I couldn't have upchucked
you couldn't have upchucked
he couldn't have upchucked
we couldn't have upchucked
you couldn't have upchucked
they couldn't have upchucked	I couldn't have been upchucking
you couldn't have been upchucking
he couldn't have been upchucking
we couldn't have been upchucking
you couldn't have been upchucking
they couldn't have been upchucking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I upchuck?
could you upchuck?
could he upchuck?
could we upchuck?
could you upchuck?
could they upchuck? 	could I be upchucking?
could you be upchucking?
could he be upchucking?
could we be upchucking?
could you be upchucking?
could they be upchucking? 	could I have upchucked?
could you have upchucked?
could he have upchucked?
could we have upchucked?
could you have upchucked?
could they have upchucked? 	could I have been upchucking?
could you have been upchucking?
could he have been upchucking?
could we have been upchucking?
could you have been upchucking?
could they have been upchucking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I upchuck?
couldn't you upchuck?
couldn't he upchuck?
couldn't we upchuck?
couldn't you upchuck?
couldn't they upchuck? 	couldn't I be upchucking?
couldn't you be upchucking?
couldn't he be upchucking?
couldn't we be upchucking?
couldn't you be upchucking?
couldn't they be upchucking? 	couldn't I have upchucked?
couldn't you have upchucked?
couldn't he have upchucked?
couldn't we have upchucked?
couldn't you have upchucked?
couldn't they have upchucked? 	couldn't I have been upchucking?
couldn't you have been upchucking?
couldn't he have been upchucking?
couldn't we have been upchucking?
couldn't you have been upchucking?
couldn't they have been upchucking?