must impugn
Verbe régulier : impugn - impugned- impugned
Traduction française : contester 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must impugn
you must impugn
she must impugn
we must impugn
you must impugn
they must impugn 	I must be impugning
you must be impugning
she must be impugning
we must be impugning
you must be impugning
they must be impugning	I must have impugned
you must have impugned
she must have impugned
we must have impugned
you must have impugned
they must have impugned	I must have been impugning
you must have been impugning
she must have been impugning
we must have been impugning
you must have been impugning
they must have been impugning	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must not impugn
you must not impugn
she must not impugn
we must not impugn
you must not impugn
they must not impugn 	I must not be impugning
you must not be impugning
she must not be impugning
we must not be impugning
you must not be impugning
they must not be impugning	I must not have impugned
you must not have impugned
she must not have impugned
we must not have impugned
you must not have impugned
they must not have impugned	I must not have been impugning
you must not have been impugning
she must not have been impugning
we must not have been impugning
you must not have been impugning
they must not have been impugning	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I impugn?
must you impugn?
must she impugn?
must we impugn?
must you impugn?
must they impugn? 	must I be impugning?
must you be impugning?
must she be impugning?
must we be impugning?
must you be impugning?
must they be impugning? 	must I have impugned?
must you have impugned?
must she have impugned?
must we have impugned?
must you have impugned?
must they have impugned? 	must I have been impugning?
must you have been impugning?
must she have been impugning?
must we have been impugning?
must you have been impugning?
must they have been impugning? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I not impugn?
must you not impugn?
must she not impugn?
must we not impugn?
must you not impugn?
must they not impugn? 	must I not be impugning?
must you not be impugning?
must she not be impugning?
must we not be impugning?
must you not be impugning?
must they not be impugning? 	must I not have impugned?
must you not have impugned?
must she not have impugned?
must we not have impugned?
must you not have impugned?
must they not have impugned? 	must I not have been impugning?
must you not have been impugning?
must she not have been impugning?
must we not have been impugning?
must you not have been impugning?
must they not have been impugning?