could prevalue
Verbe régulier : prevalue - prevalued- prevalued

Affirmation 	
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I could prevalue
you could prevalue
she could prevalue
we could prevalue
you could prevalue
they could prevalue 	I could be prevaluing
you could be prevaluing
she could be prevaluing
we could be prevaluing
you could be prevaluing
they could be prevaluing	I could have prevalued
you could have prevalued
she could have prevalued
we could have prevalued
you could have prevalued
they could have prevalued	I could have been prevaluing
you could have been prevaluing
she could have been prevaluing
we could have been prevaluing
you could have been prevaluing
they could have been prevaluing	

Négation 	
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I couldn't prevalue
you couldn't prevalue
she couldn't prevalue
we couldn't prevalue
you couldn't prevalue
they couldn't prevalue 	I couldn't be prevaluing
you couldn't be prevaluing
she couldn't be prevaluing
we couldn't be prevaluing
you couldn't be prevaluing
they couldn't be prevaluing	I couldn't have prevalued
you couldn't have prevalued
she couldn't have prevalued
we couldn't have prevalued
you couldn't have prevalued
they couldn't have prevalued	I couldn't have been prevaluing
you couldn't have been prevaluing
she couldn't have been prevaluing
we couldn't have been prevaluing
you couldn't have been prevaluing
they couldn't have been prevaluing	

Forme interrogative 	
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could I prevalue?
could you prevalue?
could she prevalue?
could we prevalue?
could you prevalue?
could they prevalue? 	could I be prevaluing?
could you be prevaluing?
could she be prevaluing?
could we be prevaluing?
could you be prevaluing?
could they be prevaluing? 	could I have prevalued?
could you have prevalued?
could she have prevalued?
could we have prevalued?
could you have prevalued?
could they have prevalued? 	could I have been prevaluing?
could you have been prevaluing?
could she have been prevaluing?
could we have been prevaluing?
could you have been prevaluing?
could they have been prevaluing? 	

Forme interro-négative 	
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couldn't I prevalue?
couldn't you prevalue?
couldn't she prevalue?
couldn't we prevalue?
couldn't you prevalue?
couldn't they prevalue? 	couldn't I be prevaluing?
couldn't you be prevaluing?
couldn't she be prevaluing?
couldn't we be prevaluing?
couldn't you be prevaluing?
couldn't they be prevaluing? 	couldn't I have prevalued?
couldn't you have prevalued?
couldn't she have prevalued?
couldn't we have prevalued?
couldn't you have prevalued?
couldn't they have prevalued? 	couldn't I have been prevaluing?
couldn't you have been prevaluing?
couldn't she have been prevaluing?
couldn't we have been prevaluing?
couldn't you have been prevaluing?
couldn't they have been prevaluing?