English verb conjugation
COULD TWIG

Regular verb: twig - twigged - twigged

Affirmation

Simple form	V-ing form
I could twig you could twig he could twig we could twig you could twig they could twig	I could be twigging you could be twigging he 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 he 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 he 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 couldn't twig you couldn't twig he couldn't twig we couldn't twig you couldn't twig they couldn't twig	I couldn't be twigging you couldn't be twigging he couldn't be twigging we couldn't be twigging you couldn't be twigging they couldn't be twigging
Perfect	V-ing perfect
I couldn't have twigged you couldn't have twigged he couldn't have twigged we couldn't have twigged you couldn't have twigged they couldn't have twigged	I couldn't have been twigging you couldn't have been twigging he couldn't have been twigging we couldn't have been twigging you couldn't have been twigging they couldn't have been twigging

Interrogative form

Simple form	V-ing form
could I twig? could you twig? could he twig? could we twig? could you twig? could they twig?	could I be twigging? could you be twigging? could he 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 he 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 he 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
couldn't I twig? couldn't you twig? couldn't he twig? couldn't we twig? couldn't you twig? couldn't they twig?	couldn't I be twigging? couldn't you be twigging? couldn't he be twigging? couldn't we be twigging? couldn't you be twigging? couldn't they be twigging?
Perfect	V-ing perfect
couldn't I have twigged? couldn't you have twigged? couldn't he have twigged? couldn't we have twigged? couldn't you have twigged? couldn't they have twigged?	couldn't I have been twigging? couldn't you have been twigging? couldn't he have been twigging? couldn't we have been twigging? couldn't you have been twigging? couldn't they have been twigging?