must foil
Verbe régulier : foil - foiled- foiled
Traduction française : déjouer - contrecarrer 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must foil
you must foil
she must foil
we must foil
you must foil
they must foil 	I must be foiling
you must be foiling
she must be foiling
we must be foiling
you must be foiling
they must be foiling	I must have foiled
you must have foiled
she must have foiled
we must have foiled
you must have foiled
they must have foiled	I must have been foiling
you must have been foiling
she must have been foiling
we must have been foiling
you must have been foiling
they must have been foiling	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must not foil
you must not foil
she must not foil
we must not foil
you must not foil
they must not foil 	I must not be foiling
you must not be foiling
she must not be foiling
we must not be foiling
you must not be foiling
they must not be foiling	I must not have foiled
you must not have foiled
she must not have foiled
we must not have foiled
you must not have foiled
they must not have foiled	I must not have been foiling
you must not have been foiling
she must not have been foiling
we must not have been foiling
you must not have been foiling
they must not have been foiling	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I foil?
must you foil?
must she foil?
must we foil?
must you foil?
must they foil? 	must I be foiling?
must you be foiling?
must she be foiling?
must we be foiling?
must you be foiling?
must they be foiling? 	must I have foiled?
must you have foiled?
must she have foiled?
must we have foiled?
must you have foiled?
must they have foiled? 	must I have been foiling?
must you have been foiling?
must she have been foiling?
must we have been foiling?
must you have been foiling?
must they have been foiling? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I not foil?
must you not foil?
must she not foil?
must we not foil?
must you not foil?
must they not foil? 	must I not be foiling?
must you not be foiling?
must she not be foiling?
must we not be foiling?
must you not be foiling?
must they not be foiling? 	must I not have foiled?
must you not have foiled?
must she not have foiled?
must we not have foiled?
must you not have foiled?
must they not have foiled? 	must I not have been foiling?
must you not have been foiling?
must she not have been foiling?
must we not have been foiling?
must you not have been foiling?
must they not have been foiling?