could expire
Verbe régulier : expire - expired- expired
Traduction française : expirer - arriver à terme 

Affirmation 	
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I could expire
you could expire
he could expire
we could expire
you could expire
they could expire 	I could be expiring
you could be expiring
he could be expiring
we could be expiring
you could be expiring
they could be expiring	I could have expired
you could have expired
he could have expired
we could have expired
you could have expired
they could have expired	I could have been expiring
you could have been expiring
he could have been expiring
we could have been expiring
you could have been expiring
they could have been expiring	

Négation 	
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I couldn't expire
you couldn't expire
he couldn't expire
we couldn't expire
you couldn't expire
they couldn't expire 	I couldn't be expiring
you couldn't be expiring
he couldn't be expiring
we couldn't be expiring
you couldn't be expiring
they couldn't be expiring	I couldn't have expired
you couldn't have expired
he couldn't have expired
we couldn't have expired
you couldn't have expired
they couldn't have expired	I couldn't have been expiring
you couldn't have been expiring
he couldn't have been expiring
we couldn't have been expiring
you couldn't have been expiring
they couldn't have been expiring	

Forme interrogative 	
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could I expire?
could you expire?
could he expire?
could we expire?
could you expire?
could they expire? 	could I be expiring?
could you be expiring?
could he be expiring?
could we be expiring?
could you be expiring?
could they be expiring? 	could I have expired?
could you have expired?
could he have expired?
could we have expired?
could you have expired?
could they have expired? 	could I have been expiring?
could you have been expiring?
could he have been expiring?
could we have been expiring?
could you have been expiring?
could they have been expiring? 	

Forme interro-négative 	
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couldn't I expire?
couldn't you expire?
couldn't he expire?
couldn't we expire?
couldn't you expire?
couldn't they expire? 	couldn't I be expiring?
couldn't you be expiring?
couldn't he be expiring?
couldn't we be expiring?
couldn't you be expiring?
couldn't they be expiring? 	couldn't I have expired?
couldn't you have expired?
couldn't he have expired?
couldn't we have expired?
couldn't you have expired?
couldn't they have expired? 	couldn't I have been expiring?
couldn't you have been expiring?
couldn't he have been expiring?
couldn't we have been expiring?
couldn't you have been expiring?
couldn't they have been expiring?