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

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

Négation 	
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I must not sap
you must not sap
he must not sap
we must not sap
you must not sap
they must not sap 	I must not be sapping
you must not be sapping
he must not be sapping
we must not be sapping
you must not be sapping
they must not be sapping	I must not have sapped
you must not have sapped
he must not have sapped
we must not have sapped
you must not have sapped
they must not have sapped	I must not have been sapping
you must not have been sapping
he must not have been sapping
we must not have been sapping
you must not have been sapping
they must not have been sapping	

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

Forme interro-négative 	
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must I not sap?
must you not sap?
must he not sap?
must we not sap?
must you not sap?
must they not sap? 	must I not be sapping?
must you not be sapping?
must he not be sapping?
must we not be sapping?
must you not be sapping?
must they not be sapping? 	must I not have sapped?
must you not have sapped?
must he not have sapped?
must we not have sapped?
must you not have sapped?
must they not have sapped? 	must I not have been sapping?
must you not have been sapping?
must he not have been sapping?
must we not have been sapping?
must you not have been sapping?
must they not have been sapping?