could refasten
Regular verb: refasten - refastened- refastened

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could refasten
you could refasten
she could refasten
we could refasten
you could refasten
they could refasten 	I could be refastening
you could be refastening
she could be refastening
we could be refastening
you could be refastening
they could be refastening	I could have refastened
you could have refastened
she could have refastened
we could have refastened
you could have refastened
they could have refastened	I could have been refastening
you could have been refastening
she could have been refastening
we could have been refastening
you could have been refastening
they could have been refastening	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't refasten
you couldn't refasten
she couldn't refasten
we couldn't refasten
you couldn't refasten
they couldn't refasten 	I couldn't be refastening
you couldn't be refastening
she couldn't be refastening
we couldn't be refastening
you couldn't be refastening
they couldn't be refastening	I couldn't have refastened
you couldn't have refastened
she couldn't have refastened
we couldn't have refastened
you couldn't have refastened
they couldn't have refastened	I couldn't have been refastening
you couldn't have been refastening
she couldn't have been refastening
we couldn't have been refastening
you couldn't have been refastening
they couldn't have been refastening	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I refasten?
could you refasten?
could she refasten?
could we refasten?
could you refasten?
could they refasten? 	could I be refastening?
could you be refastening?
could she be refastening?
could we be refastening?
could you be refastening?
could they be refastening? 	could I have refastened?
could you have refastened?
could she have refastened?
could we have refastened?
could you have refastened?
could they have refastened? 	could I have been refastening?
could you have been refastening?
could she have been refastening?
could we have been refastening?
could you have been refastening?
could they have been refastening? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I refasten?
couldn't you refasten?
couldn't she refasten?
couldn't we refasten?
couldn't you refasten?
couldn't they refasten? 	couldn't I be refastening?
couldn't you be refastening?
couldn't she be refastening?
couldn't we be refastening?
couldn't you be refastening?
couldn't they be refastening? 	couldn't I have refastened?
couldn't you have refastened?
couldn't she have refastened?
couldn't we have refastened?
couldn't you have refastened?
couldn't they have refastened? 	couldn't I have been refastening?
couldn't you have been refastening?
couldn't she have been refastening?
couldn't we have been refastening?
couldn't you have been refastening?
couldn't they have been refastening?