I must starve you must starve she must starve we must starve you must starve they must starve
V-ing form
I must be starving you must be starving she must be starving we must be starving you must be starving they must be starving
Perfect
I must have starved you must have starved she must have starved we must have starved you must have starved they must have starved
V-ing perfect
I must have been starving you must have been starving she must have been starving we must have been starving you must have been starving they must have been starving
Negation
Simple form
I mustn't starve you mustn't starve she mustn't starve we mustn't starve you mustn't starve they mustn't starve
V-ing form
I mustn't be starving you mustn't be starving she mustn't be starving we mustn't be starving you mustn't be starving they mustn't be starving
Perfect
I mustn't have starved you mustn't have starved she mustn't have starved we mustn't have starved you mustn't have starved they mustn't have starved
V-ing perfect
I mustn't have been starving you mustn't have been starving she mustn't have been starving we mustn't have been starving you mustn't have been starving they mustn't have been starving
Interrogative form
Simple form
must I starve? must you starve? must she starve? must we starve? must you starve? must they starve?
V-ing form
must I be starving? must you be starving? must she be starving? must we be starving? must you be starving? must they be starving?
Perfect
must I have starved? must you have starved? must she have starved? must we have starved? must you have starved? must they have starved?
V-ing perfect
must I have been starving? must you have been starving? must she have been starving? must we have been starving? must you have been starving? must they have been starving?
Interro-negative form
Simple form
mustn't I starve? mustn't you starve? mustn't she starve? mustn't we starve? mustn't you starve? mustn't they starve?
V-ing form
mustn't I be starving? mustn't you be starving? mustn't she be starving? mustn't we be starving? mustn't you be starving? mustn't they be starving?
Perfect
mustn't I have starved? mustn't you have starved? mustn't she have starved? mustn't we have starved? mustn't you have starved? mustn't they have starved?
V-ing perfect
mustn't I have been starving? mustn't you have been starving? mustn't she have been starving? mustn't we have been starving? mustn't you have been starving? mustn't they have been starving?