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 mustn't sap
you mustn't sap
he mustn't sap
we mustn't sap
you mustn't sap
they mustn't sap 	I mustn't be sapping
you mustn't be sapping
he mustn't be sapping
we mustn't be sapping
you mustn't be sapping
they mustn't be sapping	I mustn't have sapped
you mustn't have sapped
he mustn't have sapped
we mustn't have sapped
you mustn't have sapped
they mustn't have sapped	I mustn't have been sapping
you mustn't have been sapping
he mustn't have been sapping
we mustn't have been sapping
you mustn't have been sapping
they mustn't 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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mustn't I sap?
mustn't you sap?
mustn't he sap?
mustn't we sap?
mustn't you sap?
mustn't they sap? 	mustn't I be sapping?
mustn't you be sapping?
mustn't he be sapping?
mustn't we be sapping?
mustn't you be sapping?
mustn't they be sapping? 	mustn't I have sapped?
mustn't you have sapped?
mustn't he have sapped?
mustn't we have sapped?
mustn't you have sapped?
mustn't they have sapped? 	mustn't I have been sapping?
mustn't you have been sapping?
mustn't he have been sapping?
mustn't we have been sapping?
mustn't you have been sapping?
mustn't they have been sapping?