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