English verb conjugation
COULD RESTRING

Regular verb: restring - restringed - restringed

Affirmation

Simple form	V-ing form
I could restring you could restring he could restring we could restring you could restring they could restring	I could be restringing you could be restringing he could be restringing we could be restringing you could be restringing they could be restringing
Perfect	V-ing perfect
I could have restringed you could have restringed he could have restringed we could have restringed you could have restringed they could have restringed	I could have been restringing you could have been restringing he could have been restringing we could have been restringing you could have been restringing they could have been restringing

Negation

Simple form	V-ing form
I could not restring you could not restring he could not restring we could not restring you could not restring they could not restring	I could not be restringing you could not be restringing he could not be restringing we could not be restringing you could not be restringing they could not be restringing
Perfect	V-ing perfect
I could not have restringed you could not have restringed he could not have restringed we could not have restringed you could not have restringed they could not have restringed	I could not have been restringing you could not have been restringing he could not have been restringing we could not have been restringing you could not have been restringing they could not have been restringing

Interrogative form

Simple form	V-ing form
could I restring? could you restring? could he restring? could we restring? could you restring? could they restring?	could I be restringing? could you be restringing? could he be restringing? could we be restringing? could you be restringing? could they be restringing?
Perfect	V-ing perfect
could I have restringed? could you have restringed? could he have restringed? could we have restringed? could you have restringed? could they have restringed?	could I have been restringing? could you have been restringing? could he have been restringing? could we have been restringing? could you have been restringing? could they have been restringing?

Interro-negative form

Simple form	V-ing form
could I not restring? could you not restring? could he not restring? could we not restring? could you not restring? could they not restring?	could I not be restringing? could you not be restringing? could he not be restringing? could we not be restringing? could you not be restringing? could they not be restringing?
Perfect	V-ing perfect
could I not have restringed? could you not have restringed? could he not have restringed? could we not have restringed? could you not have restringed? could they not have restringed?	could I not have been restringing? could you not have been restringing? could he not have been restringing? could we not have been restringing? could you not have been restringing? could they not have been restringing?