English verb conjugation
COULD MILL

Regular verb: mill - milled - milled

Affirmation

Simple form	V-ing form
I could mill you could mill he could mill we could mill you could mill they could mill	I could be milling you could be milling he could be milling we could be milling you could be milling they could be milling
Perfect	V-ing perfect
I could have milled you could have milled he could have milled we could have milled you could have milled they could have milled	I could have been milling you could have been milling he could have been milling we could have been milling you could have been milling they could have been milling

Negation

Simple form	V-ing form
I could not mill you could not mill he could not mill we could not mill you could not mill they could not mill	I could not be milling you could not be milling he could not be milling we could not be milling you could not be milling they could not be milling
Perfect	V-ing perfect
I could not have milled you could not have milled he could not have milled we could not have milled you could not have milled they could not have milled	I could not have been milling you could not have been milling he could not have been milling we could not have been milling you could not have been milling they could not have been milling

Interrogative form

Simple form	V-ing form
could I mill? could you mill? could he mill? could we mill? could you mill? could they mill?	could I be milling? could you be milling? could he be milling? could we be milling? could you be milling? could they be milling?
Perfect	V-ing perfect
could I have milled? could you have milled? could he have milled? could we have milled? could you have milled? could they have milled?	could I have been milling? could you have been milling? could he have been milling? could we have been milling? could you have been milling? could they have been milling?

Interro-negative form

Simple form	V-ing form
could I not mill? could you not mill? could he not mill? could we not mill? could you not mill? could they not mill?	could I not be milling? could you not be milling? could he not be milling? could we not be milling? could you not be milling? could they not be milling?
Perfect	V-ing perfect
could I not have milled? could you not have milled? could he not have milled? could we not have milled? could you not have milled? could they not have milled?	could I not have been milling? could you not have been milling? could he not have been milling? could we not have been milling? could you not have been milling? could they not have been milling?