must backtrack
Verbe régulier : backtrack - backtracked- backtracked
Traduction française : revenir sur ses pas - faire marche arrière 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must backtrack
you must backtrack
he must backtrack
we must backtrack
you must backtrack
they must backtrack 	I must be backtracking
you must be backtracking
he must be backtracking
we must be backtracking
you must be backtracking
they must be backtracking	I must have backtracked
you must have backtracked
he must have backtracked
we must have backtracked
you must have backtracked
they must have backtracked	I must have been backtracking
you must have been backtracking
he must have been backtracking
we must have been backtracking
you must have been backtracking
they must have been backtracking	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't backtrack
you mustn't backtrack
he mustn't backtrack
we mustn't backtrack
you mustn't backtrack
they mustn't backtrack 	I mustn't be backtracking
you mustn't be backtracking
he mustn't be backtracking
we mustn't be backtracking
you mustn't be backtracking
they mustn't be backtracking	I mustn't have backtracked
you mustn't have backtracked
he mustn't have backtracked
we mustn't have backtracked
you mustn't have backtracked
they mustn't have backtracked	I mustn't have been backtracking
you mustn't have been backtracking
he mustn't have been backtracking
we mustn't have been backtracking
you mustn't have been backtracking
they mustn't have been backtracking	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I backtrack?
must you backtrack?
must he backtrack?
must we backtrack?
must you backtrack?
must they backtrack? 	must I be backtracking?
must you be backtracking?
must he be backtracking?
must we be backtracking?
must you be backtracking?
must they be backtracking? 	must I have backtracked?
must you have backtracked?
must he have backtracked?
must we have backtracked?
must you have backtracked?
must they have backtracked? 	must I have been backtracking?
must you have been backtracking?
must he have been backtracking?
must we have been backtracking?
must you have been backtracking?
must they have been backtracking? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I backtrack?
mustn't you backtrack?
mustn't he backtrack?
mustn't we backtrack?
mustn't you backtrack?
mustn't they backtrack? 	mustn't I be backtracking?
mustn't you be backtracking?
mustn't he be backtracking?
mustn't we be backtracking?
mustn't you be backtracking?
mustn't they be backtracking? 	mustn't I have backtracked?
mustn't you have backtracked?
mustn't he have backtracked?
mustn't we have backtracked?
mustn't you have backtracked?
mustn't they have backtracked? 	mustn't I have been backtracking?
mustn't you have been backtracking?
mustn't he have been backtracking?
mustn't we have been backtracking?
mustn't you have been backtracking?
mustn't they have been backtracking?