English verb conjugation
COULD REFASTEN

Regular verb: refasten - refastened - refastened

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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
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
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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?