English verb conjugation
COULD QUILL

Regular verb: quill - quilled - quilled

Affirmation

Simple form	V-ing form
I could quill you could quill he could quill we could quill you could quill they could quill	I could be quilling you could be quilling he could be quilling we could be quilling you could be quilling they could be quilling
Perfect	V-ing perfect
I could have quilled you could have quilled he could have quilled we could have quilled you could have quilled they could have quilled	I could have been quilling you could have been quilling he could have been quilling we could have been quilling you could have been quilling they could have been quilling

Negation

Simple form	V-ing form
I could not quill you could not quill he could not quill we could not quill you could not quill they could not quill	I could not be quilling you could not be quilling he could not be quilling we could not be quilling you could not be quilling they could not be quilling
Perfect	V-ing perfect
I could not have quilled you could not have quilled he could not have quilled we could not have quilled you could not have quilled they could not have quilled	I could not have been quilling you could not have been quilling he could not have been quilling we could not have been quilling you could not have been quilling they could not have been quilling

Interrogative form

Simple form	V-ing form
could I quill? could you quill? could he quill? could we quill? could you quill? could they quill?	could I be quilling? could you be quilling? could he be quilling? could we be quilling? could you be quilling? could they be quilling?
Perfect	V-ing perfect
could I have quilled? could you have quilled? could he have quilled? could we have quilled? could you have quilled? could they have quilled?	could I have been quilling? could you have been quilling? could he have been quilling? could we have been quilling? could you have been quilling? could they have been quilling?

Interro-negative form

Simple form	V-ing form
could I not quill? could you not quill? could he not quill? could we not quill? could you not quill? could they not quill?	could I not be quilling? could you not be quilling? could he not be quilling? could we not be quilling? could you not be quilling? could they not be quilling?
Perfect	V-ing perfect
could I not have quilled? could you not have quilled? could he not have quilled? could we not have quilled? could you not have quilled? could they not have quilled?	could I not have been quilling? could you not have been quilling? could he not have been quilling? could we not have been quilling? could you not have been quilling? could they not have been quilling?