English verb conjugation
COULD REFASTEN

Regular verb: refasten - refastened - refastened

Affirmation

Simple form	V-ing form
I could refasten you could refasten he could refasten we could refasten you could refasten they could refasten	I could be refastening you could be refastening he could be refastening we could be refastening you could be refastening they could be refastening
Perfect	V-ing perfect
I could have refastened you could have refastened he 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 he 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
I could not refasten you could not refasten he 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 he could not be refastening we could not be refastening you could not be refastening they could not be refastening
Perfect	V-ing perfect
I could not have refastened you could not have refastened he 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 he 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
could I refasten? could you refasten? could he refasten? could we refasten? could you refasten? could they refasten?	could I be refastening? could you be refastening? could he be refastening? could we be refastening? could you be refastening? could they be refastening?
Perfect	V-ing perfect
could I have refastened? could you have refastened? could he 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 he 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
could I not refasten? could you not refasten? could he 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 he not be refastening? could we not be refastening? could you not be refastening? could they not be refastening?
Perfect	V-ing perfect
could I not have refastened? could you not have refastened? could he 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 he not have been refastening? could we not have been refastening? could you not have been refastening? could they not have been refastening?