I must need you must need he must need we must need you must need they must need
V-ing form
I must be needing you must be needing he must be needing we must be needing you must be needing they must be needing
Perfect
I must have needed you must have needed he must have needed we must have needed you must have needed they must have needed
V-ing perfect
I must have been needing you must have been needing he must have been needing we must have been needing you must have been needing they must have been needing
Negation
Simple form
I mustn't need you mustn't need he mustn't need we mustn't need you mustn't need they mustn't need
V-ing form
I mustn't be needing you mustn't be needing he mustn't be needing we mustn't be needing you mustn't be needing they mustn't be needing
Perfect
I mustn't have needed you mustn't have needed he mustn't have needed we mustn't have needed you mustn't have needed they mustn't have needed
V-ing perfect
I mustn't have been needing you mustn't have been needing he mustn't have been needing we mustn't have been needing you mustn't have been needing they mustn't have been needing
Interrogative form
Simple form
must I need? must you need? must he need? must we need? must you need? must they need?
V-ing form
must I be needing? must you be needing? must he be needing? must we be needing? must you be needing? must they be needing?
Perfect
must I have needed? must you have needed? must he have needed? must we have needed? must you have needed? must they have needed?
V-ing perfect
must I have been needing? must you have been needing? must he have been needing? must we have been needing? must you have been needing? must they have been needing?
Interro-negative form
Simple form
mustn't I need? mustn't you need? mustn't he need? mustn't we need? mustn't you need? mustn't they need?
V-ing form
mustn't I be needing? mustn't you be needing? mustn't he be needing? mustn't we be needing? mustn't you be needing? mustn't they be needing?
Perfect
mustn't I have needed? mustn't you have needed? mustn't he have needed? mustn't we have needed? mustn't you have needed? mustn't they have needed?
V-ing perfect
mustn't I have been needing? mustn't you have been needing? mustn't he have been needing? mustn't we have been needing? mustn't you have been needing? mustn't they have been needing?