could untack
Verbe régulier : untack - untacked- untacked

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could untack
you could untack
he could untack
we could untack
you could untack
they could untack 	I could be untacking
you could be untacking
he could be untacking
we could be untacking
you could be untacking
they could be untacking	I could have untacked
you could have untacked
he could have untacked
we could have untacked
you could have untacked
they could have untacked	I could have been untacking
you could have been untacking
he could have been untacking
we could have been untacking
you could have been untacking
they could have been untacking	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could not untack
you could not untack
he could not untack
we could not untack
you could not untack
they could not untack 	I could not be untacking
you could not be untacking
he could not be untacking
we could not be untacking
you could not be untacking
they could not be untacking	I could not have untacked
you could not have untacked
he could not have untacked
we could not have untacked
you could not have untacked
they could not have untacked	I could not have been untacking
you could not have been untacking
he could not have been untacking
we could not have been untacking
you could not have been untacking
they could not have been untacking	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I untack?
could you untack?
could he untack?
could we untack?
could you untack?
could they untack? 	could I be untacking?
could you be untacking?
could he be untacking?
could we be untacking?
could you be untacking?
could they be untacking? 	could I have untacked?
could you have untacked?
could he have untacked?
could we have untacked?
could you have untacked?
could they have untacked? 	could I have been untacking?
could you have been untacking?
could he have been untacking?
could we have been untacking?
could you have been untacking?
could they have been untacking? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I not untack?
could you not untack?
could he not untack?
could we not untack?
could you not untack?
could they not untack? 	could I not be untacking?
could you not be untacking?
could he not be untacking?
could we not be untacking?
could you not be untacking?
could they not be untacking? 	could I not have untacked?
could you not have untacked?
could he not have untacked?
could we not have untacked?
could you not have untacked?
could they not have untacked? 	could I not have been untacking?
could you not have been untacking?
could he not have been untacking?
could we not have been untacking?
could you not have been untacking?
could they not have been untacking?