could sap
Verbe régulier : sap - sapped- sapped
Traduction française : saper (US) - assommer (d'un coup de gourdin) 

Affirmation 	
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I could sap
you could sap
he could sap
we could sap
you could sap
they could sap 	I could be sapping
you could be sapping
he could be sapping
we could be sapping
you could be sapping
they could be sapping	I could have sapped
you could have sapped
he could have sapped
we could have sapped
you could have sapped
they could have sapped	I could have been sapping
you could have been sapping
he could have been sapping
we could have been sapping
you could have been sapping
they could have been sapping	

Négation 	
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I couldn't sap
you couldn't sap
he couldn't sap
we couldn't sap
you couldn't sap
they couldn't sap 	I couldn't be sapping
you couldn't be sapping
he couldn't be sapping
we couldn't be sapping
you couldn't be sapping
they couldn't be sapping	I couldn't have sapped
you couldn't have sapped
he couldn't have sapped
we couldn't have sapped
you couldn't have sapped
they couldn't have sapped	I couldn't have been sapping
you couldn't have been sapping
he couldn't have been sapping
we couldn't have been sapping
you couldn't have been sapping
they couldn't have been sapping	

Forme interrogative 	
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could I sap?
could you sap?
could he sap?
could we sap?
could you sap?
could they sap? 	could I be sapping?
could you be sapping?
could he be sapping?
could we be sapping?
could you be sapping?
could they be sapping? 	could I have sapped?
could you have sapped?
could he have sapped?
could we have sapped?
could you have sapped?
could they have sapped? 	could I have been sapping?
could you have been sapping?
could he have been sapping?
could we have been sapping?
could you have been sapping?
could they have been sapping? 	

Forme interro-négative 	
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couldn't I sap?
couldn't you sap?
couldn't he sap?
couldn't we sap?
couldn't you sap?
couldn't they sap? 	couldn't I be sapping?
couldn't you be sapping?
couldn't he be sapping?
couldn't we be sapping?
couldn't you be sapping?
couldn't they be sapping? 	couldn't I have sapped?
couldn't you have sapped?
couldn't he have sapped?
couldn't we have sapped?
couldn't you have sapped?
couldn't they have sapped? 	couldn't I have been sapping?
couldn't you have been sapping?
couldn't he have been sapping?
couldn't we have been sapping?
couldn't you have been sapping?
couldn't they have been sapping?