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