must impede
Verbe régulier : impede - impeded- impeded
Traduction française : gêner - ralentir 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must impede
you must impede
he must impede
we must impede
you must impede
they must impede 	I must be impeding
you must be impeding
he must be impeding
we must be impeding
you must be impeding
they must be impeding	I must have impeded
you must have impeded
he must have impeded
we must have impeded
you must have impeded
they must have impeded	I must have been impeding
you must have been impeding
he must have been impeding
we must have been impeding
you must have been impeding
they must have been impeding	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must not impede
you must not impede
he must not impede
we must not impede
you must not impede
they must not impede 	I must not be impeding
you must not be impeding
he must not be impeding
we must not be impeding
you must not be impeding
they must not be impeding	I must not have impeded
you must not have impeded
he must not have impeded
we must not have impeded
you must not have impeded
they must not have impeded	I must not have been impeding
you must not have been impeding
he must not have been impeding
we must not have been impeding
you must not have been impeding
they must not have been impeding	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I impede?
must you impede?
must he impede?
must we impede?
must you impede?
must they impede? 	must I be impeding?
must you be impeding?
must he be impeding?
must we be impeding?
must you be impeding?
must they be impeding? 	must I have impeded?
must you have impeded?
must he have impeded?
must we have impeded?
must you have impeded?
must they have impeded? 	must I have been impeding?
must you have been impeding?
must he have been impeding?
must we have been impeding?
must you have been impeding?
must they have been impeding? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I not impede?
must you not impede?
must he not impede?
must we not impede?
must you not impede?
must they not impede? 	must I not be impeding?
must you not be impeding?
must he not be impeding?
must we not be impeding?
must you not be impeding?
must they not be impeding? 	must I not have impeded?
must you not have impeded?
must he not have impeded?
must we not have impeded?
must you not have impeded?
must they not have impeded? 	must I not have been impeding?
must you not have been impeding?
must he not have been impeding?
must we not have been impeding?
must you not have been impeding?
must they not have been impeding?