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 could not refasten
you could not refasten
she could not refasten
we could not refasten
you could not refasten
they could not refasten 	I could not be refastening
you could not be refastening
she could not be refastening
we could not be refastening
you could not be refastening
they could not be refastening	I could not have refastened
you could not have refastened
she could not have refastened
we could not have refastened
you could not have refastened
they could not have refastened	I could not have been refastening
you could not have been refastening
she could not have been refastening
we could not have been refastening
you could not have been refastening
they could not 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 	
could I not refasten?
could you not refasten?
could she not refasten?
could we not refasten?
could you not refasten?
could they not refasten? 	could I not be refastening?
could you not be refastening?
could she not be refastening?
could we not be refastening?
could you not be refastening?
could they not be refastening? 	could I not have refastened?
could you not have refastened?
could she not have refastened?
could we not have refastened?
could you not have refastened?
could they not have refastened? 	could I not have been refastening?
could you not have been refastening?
could she not have been refastening?
could we not have been refastening?
could you not have been refastening?
could they not have been refastening?