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