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
she could backfit
we could backfit
you could backfit
they could backfit 	I could be backfiting
you could be backfiting
she 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
she 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
she 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
she 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
she 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
she 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
she 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 she backfit?
could we backfit?
could you backfit?
could they backfit? 	could I be backfiting?
could you be backfiting?
could she 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 she 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 she 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 she 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 she 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 she 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 she have been backfiting?
couldn't we have been backfiting?
couldn't you have been backfiting?
couldn't they have been backfiting?