must backtrack
Verbo regular: backtrack - backtracked- backtracked

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com 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	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not backtrack
you must not backtrack
he must not backtrack
we must not backtrack
you must not backtrack
they must not backtrack 	I must not be backtracking
you must not be backtracking
he must not be backtracking
we must not be backtracking
you must not be backtracking
they must not be backtracking	I must not have backtracked
you must not have backtracked
he must not have backtracked
we must not have backtracked
you must not have backtracked
they must not have backtracked	I must not have been backtracking
you must not have been backtracking
he must not have been backtracking
we must not have been backtracking
you must not have been backtracking
they must not have been backtracking	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com 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? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not backtrack?
must you not backtrack?
must he not backtrack?
must we not backtrack?
must you not backtrack?
must they not backtrack? 	must I not be backtracking?
must you not be backtracking?
must he not be backtracking?
must we not be backtracking?
must you not be backtracking?
must they not be backtracking? 	must I not have backtracked?
must you not have backtracked?
must he not have backtracked?
must we not have backtracked?
must you not have backtracked?
must they not have backtracked? 	must I not have been backtracking?
must you not have been backtracking?
must he not have been backtracking?
must we not have been backtracking?
must you not have been backtracking?
must they not have been backtracking?