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 couldn't twill you couldn't twill he couldn't twill we couldn't twill you couldn't twill they couldn't twill	I couldn't be twilling you couldn't be twilling he couldn't be twilling we couldn't be twilling you couldn't be twilling they couldn't be twilling
Perfect	V-ing perfect
I couldn't have twilled you couldn't have twilled he couldn't have twilled we couldn't have twilled you couldn't have twilled they couldn't have twilled	I couldn't have been twilling you couldn't have been twilling he couldn't have been twilling we couldn't have been twilling you couldn't have been twilling they couldn't 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
couldn't I twill? couldn't you twill? couldn't he twill? couldn't we twill? couldn't you twill? couldn't they twill?	couldn't I be twilling? couldn't you be twilling? couldn't he be twilling? couldn't we be twilling? couldn't you be twilling? couldn't they be twilling?
Perfect	V-ing perfect
couldn't I have twilled? couldn't you have twilled? couldn't he have twilled? couldn't we have twilled? couldn't you have twilled? couldn't they have twilled?	couldn't I have been twilling? couldn't you have been twilling? couldn't he have been twilling? couldn't we have been twilling? couldn't you have been twilling? couldn't they have been twilling?