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