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 couldn't backfit
you couldn't backfit
he couldn't backfit
we couldn't backfit
you couldn't backfit
they couldn't backfit 	I couldn't be backfiting
you couldn't be backfiting
he couldn't be backfiting
we couldn't be backfiting
you couldn't be backfiting
they couldn't be backfiting	I couldn't have backfit, backfitted
you couldn't have backfit, backfitted
he couldn't have backfit, backfitted
we couldn't have backfit, backfitted
you couldn't have backfit, backfitted
they couldn't have backfit, backfitted	I couldn't have been backfiting
you couldn't have been backfiting
he couldn't have been backfiting
we couldn't have been backfiting
you couldn't have been backfiting
they couldn't 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 	
couldn't I backfit?
couldn't you backfit?
couldn't he backfit?
couldn't we backfit?
couldn't you backfit?
couldn't they backfit? 	couldn't I be backfiting?
couldn't you be backfiting?
couldn't he be backfiting?
couldn't we be backfiting?
couldn't you be backfiting?
couldn't they be backfiting? 	couldn't I have backfit, backfitted?
couldn't you have backfit, backfitted?
couldn't he have backfit, backfitted?
couldn't we have backfit, backfitted?
couldn't you have backfit, backfitted?
couldn't they have backfit, backfitted? 	couldn't I have been backfiting?
couldn't you have been backfiting?
couldn't he have been backfiting?
couldn't we have been backfiting?
couldn't you have been backfiting?
couldn't they have been backfiting?