could pupate
Regular verb: pupate - pupated- pupated

Affirmation 	
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I could pupate
you could pupate
he could pupate
we could pupate
you could pupate
they could pupate 	I could be pupating
you could be pupating
he could be pupating
we could be pupating
you could be pupating
they could be pupating	I could have pupated
you could have pupated
he could have pupated
we could have pupated
you could have pupated
they could have pupated	I could have been pupating
you could have been pupating
he could have been pupating
we could have been pupating
you could have been pupating
they could have been pupating	

Negation 	
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I couldn't pupate
you couldn't pupate
he couldn't pupate
we couldn't pupate
you couldn't pupate
they couldn't pupate 	I couldn't be pupating
you couldn't be pupating
he couldn't be pupating
we couldn't be pupating
you couldn't be pupating
they couldn't be pupating	I couldn't have pupated
you couldn't have pupated
he couldn't have pupated
we couldn't have pupated
you couldn't have pupated
they couldn't have pupated	I couldn't have been pupating
you couldn't have been pupating
he couldn't have been pupating
we couldn't have been pupating
you couldn't have been pupating
they couldn't have been pupating	

Interrogative form 	
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could I pupate?
could you pupate?
could he pupate?
could we pupate?
could you pupate?
could they pupate? 	could I be pupating?
could you be pupating?
could he be pupating?
could we be pupating?
could you be pupating?
could they be pupating? 	could I have pupated?
could you have pupated?
could he have pupated?
could we have pupated?
could you have pupated?
could they have pupated? 	could I have been pupating?
could you have been pupating?
could he have been pupating?
could we have been pupating?
could you have been pupating?
could they have been pupating? 	

Interro-negative form 	
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couldn't I pupate?
couldn't you pupate?
couldn't he pupate?
couldn't we pupate?
couldn't you pupate?
couldn't they pupate? 	couldn't I be pupating?
couldn't you be pupating?
couldn't he be pupating?
couldn't we be pupating?
couldn't you be pupating?
couldn't they be pupating? 	couldn't I have pupated?
couldn't you have pupated?
couldn't he have pupated?
couldn't we have pupated?
couldn't you have pupated?
couldn't they have pupated? 	couldn't I have been pupating?
couldn't you have been pupating?
couldn't he have been pupating?
couldn't we have been pupating?
couldn't you have been pupating?
couldn't they have been pupating?