Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I must furnish furnish you must furnish furnish she must furnish furnish we must furnish furnish you must furnish furnish they must furnish furnish
V-ing form
I must be furnish furnishing you must be furnish furnishing she must be furnish furnishing we must be furnish furnishing you must be furnish furnishing they must be furnish furnishing
Perfect
I must have furnish furnished you must have furnish furnished she must have furnish furnished we must have furnish furnished you must have furnish furnished they must have furnish furnished
V-ing perfect
I must have been furnish furnishing you must have been furnish furnishing she must have been furnish furnishing we must have been furnish furnishing you must have been furnish furnishing they must have been furnish furnishing
Negation
Simple form
I must not furnish furnish you must not furnish furnish she must not furnish furnish we must not furnish furnish you must not furnish furnish they must not furnish furnish
V-ing form
I must not be furnish furnishing you must not be furnish furnishing she must not be furnish furnishing we must not be furnish furnishing you must not be furnish furnishing they must not be furnish furnishing
Perfect
I must not have furnish furnished you must not have furnish furnished she must not have furnish furnished we must not have furnish furnished you must not have furnish furnished they must not have furnish furnished
V-ing perfect
I must not have been furnish furnishing you must not have been furnish furnishing she must not have been furnish furnishing we must not have been furnish furnishing you must not have been furnish furnishing they must not have been furnish furnishing
Interrogative form
Simple form
must I furnish furnish? must you furnish furnish? must she furnish furnish? must we furnish furnish? must you furnish furnish? must they furnish furnish?
V-ing form
must I be furnish furnishing? must you be furnish furnishing? must she be furnish furnishing? must we be furnish furnishing? must you be furnish furnishing? must they be furnish furnishing?
Perfect
must I have furnish furnished? must you have furnish furnished? must she have furnish furnished? must we have furnish furnished? must you have furnish furnished? must they have furnish furnished?
V-ing perfect
must I have been furnish furnishing? must you have been furnish furnishing? must she have been furnish furnishing? must we have been furnish furnishing? must you have been furnish furnishing? must they have been furnish furnishing?
Interro-negative form
Simple form
must I not furnish furnish? must you not furnish furnish? must she not furnish furnish? must we not furnish furnish? must you not furnish furnish? must they not furnish furnish?
V-ing form
must I not be furnish furnishing? must you not be furnish furnishing? must she not be furnish furnishing? must we not be furnish furnishing? must you not be furnish furnishing? must they not be furnish furnishing?
Perfect
must I not have furnish furnished? must you not have furnish furnished? must she not have furnish furnished? must we not have furnish furnished? must you not have furnish furnished? must they not have furnish furnished?
V-ing perfect
must I not have been furnish furnishing? must you not have been furnish furnishing? must she not have been furnish furnishing? must we not have been furnish furnishing? must you not have been furnish furnishing? must they not have been furnish furnishing?