could lessen
Verbe régulier : lessen - lessened- lessened
Traduction française : diminuer - s'atténuer 

Affirmation 	
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I could lessen
you could lessen
he could lessen
we could lessen
you could lessen
they could lessen 	I could be lessening
you could be lessening
he could be lessening
we could be lessening
you could be lessening
they could be lessening	I could have lessened
you could have lessened
he could have lessened
we could have lessened
you could have lessened
they could have lessened	I could have been lessening
you could have been lessening
he could have been lessening
we could have been lessening
you could have been lessening
they could have been lessening	

Négation 	
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I couldn't lessen
you couldn't lessen
he couldn't lessen
we couldn't lessen
you couldn't lessen
they couldn't lessen 	I couldn't be lessening
you couldn't be lessening
he couldn't be lessening
we couldn't be lessening
you couldn't be lessening
they couldn't be lessening	I couldn't have lessened
you couldn't have lessened
he couldn't have lessened
we couldn't have lessened
you couldn't have lessened
they couldn't have lessened	I couldn't have been lessening
you couldn't have been lessening
he couldn't have been lessening
we couldn't have been lessening
you couldn't have been lessening
they couldn't have been lessening	

Forme interrogative 	
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could I lessen?
could you lessen?
could he lessen?
could we lessen?
could you lessen?
could they lessen? 	could I be lessening?
could you be lessening?
could he be lessening?
could we be lessening?
could you be lessening?
could they be lessening? 	could I have lessened?
could you have lessened?
could he have lessened?
could we have lessened?
could you have lessened?
could they have lessened? 	could I have been lessening?
could you have been lessening?
could he have been lessening?
could we have been lessening?
could you have been lessening?
could they have been lessening? 	

Forme interro-négative 	
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couldn't I lessen?
couldn't you lessen?
couldn't he lessen?
couldn't we lessen?
couldn't you lessen?
couldn't they lessen? 	couldn't I be lessening?
couldn't you be lessening?
couldn't he be lessening?
couldn't we be lessening?
couldn't you be lessening?
couldn't they be lessening? 	couldn't I have lessened?
couldn't you have lessened?
couldn't he have lessened?
couldn't we have lessened?
couldn't you have lessened?
couldn't they have lessened? 	couldn't I have been lessening?
couldn't you have been lessening?
couldn't he have been lessening?
couldn't we have been lessening?
couldn't you have been lessening?
couldn't they have been lessening?