English verb conjugation
COULD TWANG

Regular verb: twang - twanged - twanged

Affirmation

Simple form	V-ing form
I could twang you could twang he could twang we could twang you could twang they could twang	I could be twanging you could be twanging he could be twanging we could be twanging you could be twanging they could be twanging
Perfect	V-ing perfect
I could have twanged you could have twanged he could have twanged we could have twanged you could have twanged they could have twanged	I could have been twanging you could have been twanging he could have been twanging we could have been twanging you could have been twanging they could have been twanging

Negation

Simple form	V-ing form
I could not twang you could not twang he could not twang we could not twang you could not twang they could not twang	I could not be twanging you could not be twanging he could not be twanging we could not be twanging you could not be twanging they could not be twanging
Perfect	V-ing perfect
I could not have twanged you could not have twanged he could not have twanged we could not have twanged you could not have twanged they could not have twanged	I could not have been twanging you could not have been twanging he could not have been twanging we could not have been twanging you could not have been twanging they could not have been twanging

Interrogative form

Simple form	V-ing form
could I twang? could you twang? could he twang? could we twang? could you twang? could they twang?	could I be twanging? could you be twanging? could he be twanging? could we be twanging? could you be twanging? could they be twanging?
Perfect	V-ing perfect
could I have twanged? could you have twanged? could he have twanged? could we have twanged? could you have twanged? could they have twanged?	could I have been twanging? could you have been twanging? could he have been twanging? could we have been twanging? could you have been twanging? could they have been twanging?

Interro-negative form

Simple form	V-ing form
could I not twang? could you not twang? could he not twang? could we not twang? could you not twang? could they not twang?	could I not be twanging? could you not be twanging? could he not be twanging? could we not be twanging? could you not be twanging? could they not be twanging?
Perfect	V-ing perfect
could I not have twanged? could you not have twanged? could he not have twanged? could we not have twanged? could you not have twanged? could they not have twanged?	could I not have been twanging? could you not have been twanging? could he not have been twanging? could we not have been twanging? could you not have been twanging? could they not have been twanging?