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 mustn't impede
you mustn't impede
he mustn't impede
we mustn't impede
you mustn't impede
they mustn't impede 	I mustn't be impeding
you mustn't be impeding
he mustn't be impeding
we mustn't be impeding
you mustn't be impeding
they mustn't be impeding	I mustn't have impeded
you mustn't have impeded
he mustn't have impeded
we mustn't have impeded
you mustn't have impeded
they mustn't have impeded	I mustn't have been impeding
you mustn't have been impeding
he mustn't have been impeding
we mustn't have been impeding
you mustn't have been impeding
they mustn't 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 	
mustn't I impede?
mustn't you impede?
mustn't he impede?
mustn't we impede?
mustn't you impede?
mustn't they impede? 	mustn't I be impeding?
mustn't you be impeding?
mustn't he be impeding?
mustn't we be impeding?
mustn't you be impeding?
mustn't they be impeding? 	mustn't I have impeded?
mustn't you have impeded?
mustn't he have impeded?
mustn't we have impeded?
mustn't you have impeded?
mustn't they have impeded? 	mustn't I have been impeding?
mustn't you have been impeding?
mustn't he have been impeding?
mustn't we have been impeding?
mustn't you have been impeding?
mustn't they have been impeding?