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