English verb conjugation
COULD TWILL

Regular verb: twill - twilled - twilled

Affirmation

Simple form	V-ing form
I could twill you could twill he could twill we could twill you could twill they could twill	I could be twilling you could be twilling he could be twilling we could be twilling you could be twilling they could be twilling
Perfect	V-ing perfect
I could have twilled you could have twilled he could have twilled we could have twilled you could have twilled they could have twilled	I could have been twilling you could have been twilling he could have been twilling we could have been twilling you could have been twilling they could have been twilling

Negation

Simple form	V-ing form
I could not twill you could not twill he could not twill we could not twill you could not twill they could not twill	I could not be twilling you could not be twilling he could not be twilling we could not be twilling you could not be twilling they could not be twilling
Perfect	V-ing perfect
I could not have twilled you could not have twilled he could not have twilled we could not have twilled you could not have twilled they could not have twilled	I could not have been twilling you could not have been twilling he could not have been twilling we could not have been twilling you could not have been twilling they could not have been twilling

Interrogative form

Simple form	V-ing form
could I twill? could you twill? could he twill? could we twill? could you twill? could they twill?	could I be twilling? could you be twilling? could he be twilling? could we be twilling? could you be twilling? could they be twilling?
Perfect	V-ing perfect
could I have twilled? could you have twilled? could he have twilled? could we have twilled? could you have twilled? could they have twilled?	could I have been twilling? could you have been twilling? could he have been twilling? could we have been twilling? could you have been twilling? could they have been twilling?

Interro-negative form

Simple form	V-ing form
could I not twill? could you not twill? could he not twill? could we not twill? could you not twill? could they not twill?	could I not be twilling? could you not be twilling? could he not be twilling? could we not be twilling? could you not be twilling? could they not be twilling?
Perfect	V-ing perfect
could I not have twilled? could you not have twilled? could he not have twilled? could we not have twilled? could you not have twilled? could they not have twilled?	could I not have been twilling? could you not have been twilling? could he not have been twilling? could we not have been twilling? could you not have been twilling? could they not have been twilling?