English verb conjugation
COULD TWIG

Regular verb: twig - twigged - twigged

Affirmation

Simple form	V-ing form
I could twig you could twig she could twig we could twig you could twig they could twig	I could be twigging you could be twigging she could be twigging we could be twigging you could be twigging they could be twigging
Perfect	V-ing perfect
I could have twigged you could have twigged she could have twigged we could have twigged you could have twigged they could have twigged	I could have been twigging you could have been twigging she could have been twigging we could have been twigging you could have been twigging they could have been twigging

Negation

Simple form	V-ing form
I could not twig you could not twig she could not twig we could not twig you could not twig they could not twig	I could not be twigging you could not be twigging she could not be twigging we could not be twigging you could not be twigging they could not be twigging
Perfect	V-ing perfect
I could not have twigged you could not have twigged she could not have twigged we could not have twigged you could not have twigged they could not have twigged	I could not have been twigging you could not have been twigging she could not have been twigging we could not have been twigging you could not have been twigging they could not have been twigging

Interrogative form

Simple form	V-ing form
could I twig? could you twig? could she twig? could we twig? could you twig? could they twig?	could I be twigging? could you be twigging? could she be twigging? could we be twigging? could you be twigging? could they be twigging?
Perfect	V-ing perfect
could I have twigged? could you have twigged? could she have twigged? could we have twigged? could you have twigged? could they have twigged?	could I have been twigging? could you have been twigging? could she have been twigging? could we have been twigging? could you have been twigging? could they have been twigging?

Interro-negative form

Simple form	V-ing form
could I not twig? could you not twig? could she not twig? could we not twig? could you not twig? could they not twig?	could I not be twigging? could you not be twigging? could she not be twigging? could we not be twigging? could you not be twigging? could they not be twigging?
Perfect	V-ing perfect
could I not have twigged? could you not have twigged? could she not have twigged? could we not have twigged? could you not have twigged? could they not have twigged?	could I not have been twigging? could you not have been twigging? could she not have been twigging? could we not have been twigging? could you not have been twigging? could they not have been twigging?