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 couldn't restring you couldn't restring he couldn't restring we couldn't restring you couldn't restring they couldn't restring	I couldn't be restringing you couldn't be restringing he couldn't be restringing we couldn't be restringing you couldn't be restringing they couldn't be restringing
Perfect	V-ing perfect
I couldn't have restringed you couldn't have restringed he couldn't have restringed we couldn't have restringed you couldn't have restringed they couldn't have restringed	I couldn't have been restringing you couldn't have been restringing he couldn't have been restringing we couldn't have been restringing you couldn't have been restringing they couldn't 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
couldn't I restring? couldn't you restring? couldn't he restring? couldn't we restring? couldn't you restring? couldn't they restring?	couldn't I be restringing? couldn't you be restringing? couldn't he be restringing? couldn't we be restringing? couldn't you be restringing? couldn't they be restringing?
Perfect	V-ing perfect
couldn't I have restringed? couldn't you have restringed? couldn't he have restringed? couldn't we have restringed? couldn't you have restringed? couldn't they have restringed?	couldn't I have been restringing? couldn't you have been restringing? couldn't he have been restringing? couldn't we have been restringing? couldn't you have been restringing? couldn't they have been restringing?