must blunder
Verbe régulier : blunder - blundered- blundered
Traduction française : faire une gaffe ou un impair - avancer à l'aveuglette 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must blunder
you must blunder
he must blunder
we must blunder
you must blunder
they must blunder 	I must be blundering
you must be blundering
he must be blundering
we must be blundering
you must be blundering
they must be blundering	I must have blundered
you must have blundered
he must have blundered
we must have blundered
you must have blundered
they must have blundered	I must have been blundering
you must have been blundering
he must have been blundering
we must have been blundering
you must have been blundering
they must have been blundering	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't blunder
you mustn't blunder
he mustn't blunder
we mustn't blunder
you mustn't blunder
they mustn't blunder 	I mustn't be blundering
you mustn't be blundering
he mustn't be blundering
we mustn't be blundering
you mustn't be blundering
they mustn't be blundering	I mustn't have blundered
you mustn't have blundered
he mustn't have blundered
we mustn't have blundered
you mustn't have blundered
they mustn't have blundered	I mustn't have been blundering
you mustn't have been blundering
he mustn't have been blundering
we mustn't have been blundering
you mustn't have been blundering
they mustn't have been blundering	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I blunder?
must you blunder?
must he blunder?
must we blunder?
must you blunder?
must they blunder? 	must I be blundering?
must you be blundering?
must he be blundering?
must we be blundering?
must you be blundering?
must they be blundering? 	must I have blundered?
must you have blundered?
must he have blundered?
must we have blundered?
must you have blundered?
must they have blundered? 	must I have been blundering?
must you have been blundering?
must he have been blundering?
must we have been blundering?
must you have been blundering?
must they have been blundering? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I blunder?
mustn't you blunder?
mustn't he blunder?
mustn't we blunder?
mustn't you blunder?
mustn't they blunder? 	mustn't I be blundering?
mustn't you be blundering?
mustn't he be blundering?
mustn't we be blundering?
mustn't you be blundering?
mustn't they be blundering? 	mustn't I have blundered?
mustn't you have blundered?
mustn't he have blundered?
mustn't we have blundered?
mustn't you have blundered?
mustn't they have blundered? 	mustn't I have been blundering?
mustn't you have been blundering?
mustn't he have been blundering?
mustn't we have been blundering?
mustn't you have been blundering?
mustn't they have been blundering?