English verb conjugation
MUST BLUR

Regular verb: blur - blurred - blurred

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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