could backtrack
Verbo regular: backtrack - backtracked- backtracked

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could backtrack
you could backtrack
he could backtrack
we could backtrack
you could backtrack
they could backtrack 	I could be backtracking
you could be backtracking
he could be backtracking
we could be backtracking
you could be backtracking
they could be backtracking	I could have backtracked
you could have backtracked
he could have backtracked
we could have backtracked
you could have backtracked
they could have backtracked	I could have been backtracking
you could have been backtracking
he could have been backtracking
we could have been backtracking
you could have been backtracking
they could have been backtracking	

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

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I backtrack?
could you backtrack?
could he backtrack?
could we backtrack?
could you backtrack?
could they backtrack? 	could I be backtracking?
could you be backtracking?
could he be backtracking?
could we be backtracking?
could you be backtracking?
could they be backtracking? 	could I have backtracked?
could you have backtracked?
could he have backtracked?
could we have backtracked?
could you have backtracked?
could they have backtracked? 	could I have been backtracking?
could you have been backtracking?
could he have been backtracking?
could we have been backtracking?
could you have been backtracking?
could they have been backtracking? 	

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