could prolongate
Verbe régulier : prolongate - prolongated- prolongated

Affirmation 	
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I could prolongate
you could prolongate
he could prolongate
we could prolongate
you could prolongate
they could prolongate 	I could be prolongating
you could be prolongating
he could be prolongating
we could be prolongating
you could be prolongating
they could be prolongating	I could have prolongated
you could have prolongated
he could have prolongated
we could have prolongated
you could have prolongated
they could have prolongated	I could have been prolongating
you could have been prolongating
he could have been prolongating
we could have been prolongating
you could have been prolongating
they could have been prolongating	

Négation 	
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I couldn't prolongate
you couldn't prolongate
he couldn't prolongate
we couldn't prolongate
you couldn't prolongate
they couldn't prolongate 	I couldn't be prolongating
you couldn't be prolongating
he couldn't be prolongating
we couldn't be prolongating
you couldn't be prolongating
they couldn't be prolongating	I couldn't have prolongated
you couldn't have prolongated
he couldn't have prolongated
we couldn't have prolongated
you couldn't have prolongated
they couldn't have prolongated	I couldn't have been prolongating
you couldn't have been prolongating
he couldn't have been prolongating
we couldn't have been prolongating
you couldn't have been prolongating
they couldn't have been prolongating	

Forme interrogative 	
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could I prolongate?
could you prolongate?
could he prolongate?
could we prolongate?
could you prolongate?
could they prolongate? 	could I be prolongating?
could you be prolongating?
could he be prolongating?
could we be prolongating?
could you be prolongating?
could they be prolongating? 	could I have prolongated?
could you have prolongated?
could he have prolongated?
could we have prolongated?
could you have prolongated?
could they have prolongated? 	could I have been prolongating?
could you have been prolongating?
could he have been prolongating?
could we have been prolongating?
could you have been prolongating?
could they have been prolongating? 	

Forme interro-négative 	
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couldn't I prolongate?
couldn't you prolongate?
couldn't he prolongate?
couldn't we prolongate?
couldn't you prolongate?
couldn't they prolongate? 	couldn't I be prolongating?
couldn't you be prolongating?
couldn't he be prolongating?
couldn't we be prolongating?
couldn't you be prolongating?
couldn't they be prolongating? 	couldn't I have prolongated?
couldn't you have prolongated?
couldn't he have prolongated?
couldn't we have prolongated?
couldn't you have prolongated?
couldn't they have prolongated? 	couldn't I have been prolongating?
couldn't you have been prolongating?
couldn't he have been prolongating?
couldn't we have been prolongating?
couldn't you have been prolongating?
couldn't they have been prolongating?