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