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 couldn't quill you couldn't quill he couldn't quill we couldn't quill you couldn't quill they couldn't quill	I couldn't be quilling you couldn't be quilling he couldn't be quilling we couldn't be quilling you couldn't be quilling they couldn't be quilling
Perfect	V-ing perfect
I couldn't have quilled you couldn't have quilled he couldn't have quilled we couldn't have quilled you couldn't have quilled they couldn't have quilled	I couldn't have been quilling you couldn't have been quilling he couldn't have been quilling we couldn't have been quilling you couldn't have been quilling they couldn't 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
couldn't I quill? couldn't you quill? couldn't he quill? couldn't we quill? couldn't you quill? couldn't they quill?	couldn't I be quilling? couldn't you be quilling? couldn't he be quilling? couldn't we be quilling? couldn't you be quilling? couldn't they be quilling?
Perfect	V-ing perfect
couldn't I have quilled? couldn't you have quilled? couldn't he have quilled? couldn't we have quilled? couldn't you have quilled? couldn't they have quilled?	couldn't I have been quilling? couldn't you have been quilling? couldn't he have been quilling? couldn't we have been quilling? couldn't you have been quilling? couldn't they have been quilling?