English verb conjugation
COULD BLUR

Regular verb: blur - blurred - blurred

Affirmation

Simple form	V-ing form
I could blur you could blur he could blur we could blur you could blur they could blur	I could be blurring you could be blurring he could be blurring we could be blurring you could be blurring they could be blurring
Perfect	V-ing perfect
I could have blurred you could have blurred he could have blurred we could have blurred you could have blurred they could have blurred	I could have been blurring you could have been blurring he could have been blurring we could have been blurring you could have been blurring they could have been blurring

Negation

Simple form	V-ing form
I could not blur you could not blur he could not blur we could not blur you could not blur they could not blur	I could not be blurring you could not be blurring he could not be blurring we could not be blurring you could not be blurring they could not be blurring
Perfect	V-ing perfect
I could not have blurred you could not have blurred he could not have blurred we could not have blurred you could not have blurred they could not have blurred	I could not have been blurring you could not have been blurring he could not have been blurring we could not have been blurring you could not have been blurring they could not have been blurring

Interrogative form

Simple form	V-ing form
could I blur? could you blur? could he blur? could we blur? could you blur? could they blur?	could I be blurring? could you be blurring? could he be blurring? could we be blurring? could you be blurring? could they be blurring?
Perfect	V-ing perfect
could I have blurred? could you have blurred? could he have blurred? could we have blurred? could you have blurred? could they have blurred?	could I have been blurring? could you have been blurring? could he have been blurring? could we have been blurring? could you have been blurring? could they have been blurring?

Interro-negative form

Simple form	V-ing form
could I not blur? could you not blur? could he not blur? could we not blur? could you not blur? could they not blur?	could I not be blurring? could you not be blurring? could he not be blurring? could we not be blurring? could you not be blurring? could they not be blurring?
Perfect	V-ing perfect
could I not have blurred? could you not have blurred? could he not have blurred? could we not have blurred? could you not have blurred? could they not have blurred?	could I not have been blurring? could you not have been blurring? could he not have been blurring? could we not have been blurring? could you not have been blurring? could they not have been blurring?