could wane
Verbe régulier : wane - waned- waned
Traduction française : décroître - diminuer 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could wane
you could wane
he could wane
we could wane
you could wane
they could wane 	I could be waning
you could be waning
he could be waning
we could be waning
you could be waning
they could be waning	I could have waned
you could have waned
he could have waned
we could have waned
you could have waned
they could have waned	I could have been waning
you could have been waning
he could have been waning
we could have been waning
you could have been waning
they could have been waning	

Négation 	
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I could not wane
you could not wane
he could not wane
we could not wane
you could not wane
they could not wane 	I could not be waning
you could not be waning
he could not be waning
we could not be waning
you could not be waning
they could not be waning	I could not have waned
you could not have waned
he could not have waned
we could not have waned
you could not have waned
they could not have waned	I could not have been waning
you could not have been waning
he could not have been waning
we could not have been waning
you could not have been waning
they could not have been waning	

Forme interrogative 	
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could I wane?
could you wane?
could he wane?
could we wane?
could you wane?
could they wane? 	could I be waning?
could you be waning?
could he be waning?
could we be waning?
could you be waning?
could they be waning? 	could I have waned?
could you have waned?
could he have waned?
could we have waned?
could you have waned?
could they have waned? 	could I have been waning?
could you have been waning?
could he have been waning?
could we have been waning?
could you have been waning?
could they have been waning? 	

Forme interro-négative 	
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could I not wane?
could you not wane?
could he not wane?
could we not wane?
could you not wane?
could they not wane? 	could I not be waning?
could you not be waning?
could he not be waning?
could we not be waning?
could you not be waning?
could they not be waning? 	could I not have waned?
could you not have waned?
could he not have waned?
could we not have waned?
could you not have waned?
could they not have waned? 	could I not have been waning?
could you not have been waning?
could he not have been waning?
could we not have been waning?
could you not have been waning?
could they not have been waning?