could backfit
Irregular verb: backfit - backfit, backfitted- backfit, backfitted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could backfit
you could backfit
he could backfit
we could backfit
you could backfit
they could backfit 	I could be backfiting
you could be backfiting
he could be backfiting
we could be backfiting
you could be backfiting
they could be backfiting	I could have backfit, backfitted
you could have backfit, backfitted
he could have backfit, backfitted
we could have backfit, backfitted
you could have backfit, backfitted
they could have backfit, backfitted	I could have been backfiting
you could have been backfiting
he could have been backfiting
we could have been backfiting
you could have been backfiting
they could have been backfiting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not backfit
you could not backfit
he could not backfit
we could not backfit
you could not backfit
they could not backfit 	I could not be backfiting
you could not be backfiting
he could not be backfiting
we could not be backfiting
you could not be backfiting
they could not be backfiting	I could not have backfit, backfitted
you could not have backfit, backfitted
he could not have backfit, backfitted
we could not have backfit, backfitted
you could not have backfit, backfitted
they could not have backfit, backfitted	I could not have been backfiting
you could not have been backfiting
he could not have been backfiting
we could not have been backfiting
you could not have been backfiting
they could not have been backfiting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I backfit?
could you backfit?
could he backfit?
could we backfit?
could you backfit?
could they backfit? 	could I be backfiting?
could you be backfiting?
could he be backfiting?
could we be backfiting?
could you be backfiting?
could they be backfiting? 	could I have backfit, backfitted?
could you have backfit, backfitted?
could he have backfit, backfitted?
could we have backfit, backfitted?
could you have backfit, backfitted?
could they have backfit, backfitted? 	could I have been backfiting?
could you have been backfiting?
could he have been backfiting?
could we have been backfiting?
could you have been backfiting?
could they have been backfiting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not backfit?
could you not backfit?
could he not backfit?
could we not backfit?
could you not backfit?
could they not backfit? 	could I not be backfiting?
could you not be backfiting?
could he not be backfiting?
could we not be backfiting?
could you not be backfiting?
could they not be backfiting? 	could I not have backfit, backfitted?
could you not have backfit, backfitted?
could he not have backfit, backfitted?
could we not have backfit, backfitted?
could you not have backfit, backfitted?
could they not have backfit, backfitted? 	could I not have been backfiting?
could you not have been backfiting?
could he not have been backfiting?
could we not have been backfiting?
could you not have been backfiting?
could they not have been backfiting?