I must spread you must spread she must spread we must spread you must spread they must spread
V-ing form
I must be spreading you must be spreading she must be spreading we must be spreading you must be spreading they must be spreading
Perfect
I must have spread you must have spread she must have spread we must have spread you must have spread they must have spread
V-ing perfect
I must have been spreading you must have been spreading she must have been spreading we must have been spreading you must have been spreading they must have been spreading
Negation
Simple form
I must not spread you must not spread she must not spread we must not spread you must not spread they must not spread
V-ing form
I must not be spreading you must not be spreading she must not be spreading we must not be spreading you must not be spreading they must not be spreading
Perfect
I must not have spread you must not have spread she must not have spread we must not have spread you must not have spread they must not have spread
V-ing perfect
I must not have been spreading you must not have been spreading she must not have been spreading we must not have been spreading you must not have been spreading they must not have been spreading
Interrogative form
Simple form
must I spread? must you spread? must she spread? must we spread? must you spread? must they spread?
V-ing form
must I be spreading? must you be spreading? must she be spreading? must we be spreading? must you be spreading? must they be spreading?
Perfect
must I have spread? must you have spread? must she have spread? must we have spread? must you have spread? must they have spread?
V-ing perfect
must I have been spreading? must you have been spreading? must she have been spreading? must we have been spreading? must you have been spreading? must they have been spreading?
Interro-negative form
Simple form
must I not spread? must you not spread? must she not spread? must we not spread? must you not spread? must they not spread?
V-ing form
must I not be spreading? must you not be spreading? must she not be spreading? must we not be spreading? must you not be spreading? must they not be spreading?
Perfect
must I not have spread? must you not have spread? must she not have spread? must we not have spread? must you not have spread? must they not have spread?
V-ing perfect
must I not have been spreading? must you not have been spreading? must she not have been spreading? must we not have been spreading? must you not have been spreading? must they not have been spreading?